Wednesday, October 13, 2010

Today's Homework

Just try not to bother me!

Monday, June 21, 2010

Exam Review Study Guide

Define

perpendicular- Describes line that intersect at right angle
Parallel- Line that never meet
Intersection- Line that Cross at any angle
perpendicular bisector-A line that divides a line segment in a half
Angle bisector- of a triangle is a line segment that bisects one of the vertex angle of a triangle.
acute angle- An acute angle is one which is less than 90°
Obtuse angle- An angle whose measure is greater than 90° and less than 180°

Label
Parallel






Intersection

Angle bisector Perpendicular bisector

Friday, June 18, 2010

Area



The number of square units cantained in a two demensional shape




eg.


this square has an area of 4 square units







-Area is the surface space a shape takes up.


Area of square or rectangle length X width=

L*W=area


eg.
area=6x3
=18 cm2
Parallelgram-a four sided figure with opposille sides parallel and equal
eg.

Measures of Central Tendancy

Mean- a measure of central tendancy

You can find the mean by the sum (adding) of a set of values divided by the number of values in the set.
eg. 4,5,8,9,9

=4+5+8+9+9 / 5
=35 / 5
=7 <- that is the mean or average


mean-7
median-7
mode-7

b)300,250,400,300,250
-250,250,300,300,400

mean-300
median-300
mode-250 and 300


PG. 431-432 # 2-16

Measure of Central Tendency

- is a value that represents the centre of a set of data
- can be mean, median, mode



Median - the middle number in a set of data after the data has been arranged or ordered

eg. 2, 5, 6, 8, 9 median is 6

eg. 1, 3, 6, 8, 9, 10 median is 7

*add the two middle values together then divide by two : 6 + 8 = 14 14 divided by 2 = 7

*to find the median of data sets with an even number of values (eg. 2, 3, 4, 5, 6, 7) you have to use the above steps (add together , divide sum by 2, or in other words, find the mean/average)



Mode - the most frequently occuring number in a set of data

eg. 3, 5, 7, 7, 9 mode: 7

eg. 2, 2, 4, 6, 6, 8, 11 mode: 2 and 6

eg. 1, 2, 3, 4 mode: none

eg. 1, 2, 2, 2, 3, 3, 4, 4 mode: 2

eg. 2, 3, 2, 3, 4, 2, 4, 3, 4
2, 2, 2, 3, 3, 3, 4, 4, 4 mode: none



Mean - a measure of central tendency
- the sum (adding) of a set of values divided by the number of values in a set

eg. 4, 5, 8, 9, 9
= 4 + 5 + 8 + 9 + 9 divided by 5 = 35 divided by 5
= 7 - this is the mean

Mean - A. K. A. - average


Try these, find Mean, Median, Mode.

A) 7, 8, 6, 9, 9, 5, 7, 7, 8 ,4

4, 5, 6, 7, 7, 7, 8, 8, 9, 9 median: 7 mode: 7 mean: 7


B) 300, 250, 400, 300, 250

250, 250, 300, 300, 400 median: 300 mode: 250 and 300 mean: 300



Here are some websites to give you some extra help if you're still stuck.

http://www.mun.ca/educ/ed4361/virtual_academy/campus_a/losinskim/mean,median,mode.html

http://simon.cs.vt.edu/sosci/Site/MMM/mmm.html

Here is a link to a video that is catchy and helps to remember the mean, median, and mode.

http://www.youtube.com/watch?v=uydzT_WiRz4

Sorry it's a link, I couldn't get it to upload.

Props to Julibella :). I saw the video on her post and it gave me the idea to use it.


Measures of Central Tendancy

How to find the mean is by the sum(adding) of a set of values divided by the number of values in the set.
eg. 1+2+3=6/3 eg. 4,5,8,9,9
3 sets of values
=4+5+8+9+9/5
=35/5
=7<- this is the mean. a.k.a average
Try this mean, median, mode
A) 7,8,6,9,9,5,7,7,8,4

mean-7
median-7
mode-7
B) 300,250,300,300,400 pg.431-433 #2-16

http://www.youtube.com/watch?v=QH2obAPwfqk
-Here is a video about mean, median and mode. I hope it helps:)

exam review



300 ugly kids were asked what is their favorite color. How many like blue? How many like green? How many like gold.




x3

blue 25/100 =75/300

x3


x3

green 300/100=90/300

x3

x3

gold 45/100=135/300

x3

Thursday, June 17, 2010

$ + $ +$+ !!!!!

The expression for this would be 3c+5
This an expression because it's not asking for the answer.

Write an expression representing 3 more than six times a number.

bn+3 is the expression.

bn becaue these letters are kissing that's means it is mutyplying.

+ 3 means it adding 3 of course.


SO alway's remeber that a expression means
the question. NEVER ANSWER An EXPRESSION.

Jimmy leaves home with 20$ in his pocket. He stops at billy's house to collect the $15
he lent to billy. He then goes and buy's flowers for casey because it is her birthday. The flowers
cost $27, how much money does jimmy have left?

20+15=35
35-27=8
jimmy has 8 dollors left.


*cheack out this link that talks about expressions*
http://http://en.wikipedia.org/wiki/Mathematical_notation#Expressions



awesome vedio on evaluating expression.

Remeber to study for exams.
Math exam is on tuesday.


http://http://cemc2.math.uwaterloo.ca/wired_math/english/grade7/index.html

*Also try these fun math games to excersize your brain*

And don't wait for the last second to study here are some great study tips

START EARLY!

These are the top ten things that you need to know to Ace exams!
Give yourself plenty of time.
Cramming doesn’t work. It just doesn’t. When you start to study weeks ahead you have plenty of time to read everything. It also gives you time to ask questions about anything you don’t fully understand.
Use an Agenda.
Write your study time in your agenda, even if it’s only 20 minutes a night. An agenda is one of the best organizational tools you have to help you prepare for your exams.
Set up a study stadium.
Okay, it doesn’t have to be an actual stadium—just an area where you can leave your notes, your pencils, and your dictionary. Someplace where you are comfortable and where there is little distraction—that means no TV or blaring music!
Look at the big picture.
How many pages in total do you have to study? How much time? If you have 50 pages to cover in 10 weeks, then that is only 1page a night on weekdays, with weekends off. That’s not so bad! You can even write down what pages to study on what night.
Study a little bit every night.
When you start early enough you can easily avoid the stress and anxiety of pulling an all-nighter. And, you can move at a steadier pace—20 minutes a night is easier to handle than 7 hours the night before. By the week before the exam you’ll have read everything at least once and you’ll be prepared!
Make your own notes.
Look at the chapter or unit or section. What are the titles, heading and subheadings? Are there any bolded words? Write these down. These are key words, and they are great indicators to help you know what the material is about.
Put it in your own words.
This is known a paraphrasing and it’s a great technique to help you really understand the material. Memorization and rote repetition? That’s for robots? You need to understand the material to succeed!
Cover, recite and check.
But how do you paraphrase? It’s as easy as reading over a page, a paragraph, or a sentence, then covering it up, and saying it back in your own words!
Don’t study the stuff you know well.
Start with the most challenging sections and move on from there. There is no point studying material that you are confident you know. A quick review to make sure you remember everything is enough.
Make classroom time active learning time.
The best study tip is one that doesn’t even involve studying, but happens way before studying—in the classroom. The secret to easy studying is to be an active learner in the classroom. Raise your hand. Ask questions. Participate in discussions. Don’t just sit and wait for the teacher to teach you, get involved in learning!
The more responsibility you take for your education, the easier learning— and studying—will be

Good luck everyone!!!:)

Tuesday, June 15, 2010

How To Scribe

To scribe, you must learn these terms:

Link-highlight a word and press the link button then look for a site that you think will build interest, then you copy and paste the URL. After you get a link, click on 'Preview' and test the link.
For example-Artemis Fowl

Image-find an image (Google images), then save it to your computer, then browse and find the image that you saved (delete if useless). You can change the layout and size. Then you press'Upload Image' then you're done. For example-

Video-go to Youtube, then find a video that will build interest in the math topic. Once you have found a video, click on it and go to the gray box, then highlight and copy the code that is in the box titled 'embed'. Then click 'edit HTML' on the blog, then scroll to the bottom then paste the code, then paste the code, and then click compose and preview.
For example-


Font-to change the font, click the arrow next to the word 'font', then scroll down and find a font that you like and that others can read.
For example-The quick brown fox jumps overs the lazy dog and into the stainless steel pole.

Colour-to change the colour, click on the T with the multi-coloured square, and then change the colours of important facts and titles. Try not to use too much colour, as it is distracting. Also, avoid colours like yellow, as it is hard to see.
For example-The quick brown fox jumps over the lazy dog and is shot by the hunter lying in wait.

Size-to change the size, click the double T's, then choose the size you want to write with. Just don't make the size too small or too large.
For example-The quick brown fox jumped over the lazy dog...and nothing happened to it.
Hope you enjoyed this post. :)

Friday, June 4, 2010

Exam Review Study Guide

Important Definitions:
Perpendicular- lines that intersect at right angles (90 degrees)
Parallel- lines in the same plane that never cross or interest
Interescting- lines that cross at any angle
Perpendicular bisector- a line that divides a line segment in half at a right angle
Angle bisector- a line that divides an angle into two equal parts
Acute angle- an angle at less than 90 degrees
Obtuse angle- an angle more than 90 degrees
Right angle- an angle exactly 90 degrees

- the formula for the area of a triangle is base times height divided by 2.
- the formula for the area of a parallelogram is base times height.


If the base of a parallelogram is 50m and the height is 20m, what is the area?
A= bxh
A= 50 X 20
A = 1000 m 2

Converting fractions, decimals and percents...
-Remember that fractions are out of any whole number.
-Percents are out of 100.
-Decimals are out of 1.


Sorry for not including any pictures, my computer is messed up at the moment..

** Reminder **
Be sure to have the math package ready to hand in by Monday!
And study, study, study for the exaaaams.
Have a good weekend :D
Make sure you comment on all the blogs even the old ones?


Make sure you do all 10 of the homework package we got today so you can get marks.



1. 449-451 #3-16

2.444-445 #1-8

3.426-427 #1-17

4.405-407 #1-21

5.327-439 #1-21

6.319-322 #1-23

7.313-315 #1-20

8.270-272 #1-15

9.247-251 #1-3

10.220-221 #1-14
DEFINE
Perpendicular- Describe lines that intersect at right angles.
Parallel-Discribe lines in the same plane that never crossor intersect.
Intersecting- lines that cross at any angles.
Perpendicular bisector- A line that divides a line segment in half and is at right angles to it.
Angle bisector-
acute angle-
obtuse angle-
right angle-
formula area of triangle-
formula area of parallelogram- X
B x X

Term 3 homework package

Your homework package is due Monday June 7 2010.
Please hand the package to me in the following order.

1. pg. 449 - 451 # 3 - 16
2. pg. 444 - 445 # 1 - 8
3. pg. 426 - 427 # 1 - 17
4. pg. 405 - 407 # 1 - 21
5. pg. 327 - 329 # 1 - 21
6. pg. 319 - 322 # 1 - 23
7. pg. 313 - 315 # 1 - 20
8. pg. 270 - 272 # 1 - 15
9. pg. 249 - 251 # 1 - 3
10. pg. 220 - 221 # 1 - 14

If you are disorganized and can't find your homework from term 3, you will have to redo any pages you are missing. Log on to mytextbook.ca for the pages you need to complete.

Wednesday, June 2, 2010

Translation-A slide across a straight line.
Rotation-A turn in a center of rotation.
Reflection-A flip over a
mirror line.(Mirror Line can be anywhere,not only on axis)













Quadrants-The four regions on the grid.
X=Horizontal
Y=Vertical

X always before Y.


MORE EXAMPLES OF A CARTESIAN PLANE:)










EG. of Rotation:)












EG. of Reflection:)













MATH TEST TOMOROW!
STUDY FRACTIONS,INTEGERS,MEAN,
MEDIAN,MODE,OUTLIER,RANGE,
ALGEBRA,TRANSLATION,ROTATION,
REFLECTION,and etc.(WILL BE SCANTRON XD)

http://www.youtube.com/watch?v=xhLCYp8CVIQ&feature=fvw



















Tuesday, June 1, 2010

Term 3 Test : Thursday, June 3

Topics:

Fractions
- adding, subtracting like and unlike denominators and mixed numbers




Integers- adding, subtracting positive and negative numbers, using number lines and chips

Algebra- 1 step and 2 step problems, check your answer

Measure of Central Tendency- mean, median, mode, range, and outliers

Remember:
-the test is Scantron
-30 questions
-no extra time to finish your test

Exam Review- Study Guide

1. 27.53 + 1.09 + 62.78 + 9.87 = ?
2. 849.37 - 26.08 - 3290165 = ?
3. 13.94 x 22 = ?
4. 451.231 ÷ 24.13 = ?
5. 223.8704 ÷ ? = 59.54
6. 6 + 2 x 4 = ?
7. 8 ÷(1+3)(6-2) + 3squared = ?
8. 4cubed -(5x2-5)-(20+13x3) = ?

Don't forget to study all of your term 3 notes to be prepared for you test! Good Luck! ☺☻

This is a video of how to subtract mixed numbers with unlike denominators.


This is a video on how to add and subtract integers.


This is a video on how to do 2 step algebra.


These two videos are on Measure of Central Tendency: Mean, Median, Mode, and Range.


Tuesday, May 25, 2010

Chose the Best Measure of Central Tendancy


Find the mean, mode, median and range


Mode = 7
Median = 9
Mean = 13
Range = 43

The median is the best measure of central tendancy.
The median is the best because most of the numbers are close to 9

How many shirts should I buy for the next 30 weeks?
9 x 30 = 270
130 x 3 = 390

Monday, May 24, 2010

Find the mean, median, mode, range, and outliers

a. 12 , 20 , 18 , 15 , 10 , 10 , 12
b. 48 ,32 ,67 ,61 ,47 ,95 ,89 ,888 ,1

First (order)
a. 10 ,12 ,12 ,15 ,18 ,20
b. 1 ,32 ,47 ,48 ,61 ,67 ,89 ,95 ,888


a. mean: 14.5 b. mean: 147.56
median: 13.5 median: 61
mode: 12 mode: no mode
range: 10 range: 887
outlier: no outlier outlier: 888, 1



Effect of outliers

Some outliers need to be removed from a data set. This is typically a judgement call.

Outliers have an effect on all measures of central tendency.



http://www.schooltube.com/video/85e9382853d3425594fd/Mean-Median-Mode-Range-Outliers




Homework- Page 444-445 numbers 1-8

www.mytextbook.ca

Sunday, May 23, 2010

Effects of Outliers

Some outliers need be removed from a data set. This is typically a judgement call.

Outliers have an effect on all measures of central tendency.



*Page 444 - 445, # 1 - 8 is HOMEWORK!
http://ebook.mytextbook.ca/

*Remember to have all of the number of the day pages complete by Tuesday. Mr. Isfeld will be collecting them.

Wednesday, May 19, 2010

Range and Outliers

Range -

The positive difference between the largest and smallest values in a data set

Eg. 6, 2, 9, 4, 3 - data set

2, 3, 4, 6, 9 - ordered from least to greatest

9 - 2 = 7

The range is 7

Eg. -8, -1, -3, -5

-8, -5, -3, -1

(-1) - (18) = 7

The range is 7

Outliers -

A value that is much smaller or larger than the other data values

A data set man have one or more outliers or no outliers

* In other words, it's just like finding something that doesn't belong

*In this case, you are looking for numbers that have a big difference between the other numbers


Find the range-

a) 7, 4, 3, 6, 2, 5, 8, 3

2, 3, 3, 4, 5, 6, 7, 8

8 - 2 = 6

The range is 6


b) 11, 8, 8, 5, 7, 6, 7, 6, 6

5, 6, 6, 6, 7, 7, 8, 8, 11

11 - 5 = 6

The range is 6


c) -4, 3, -1 , 0, 2

-4, -1, 0, 2, 3

3 - (-4) = 7

The range is 7


Find the outliers-

a) 18, 19, 79, 17, 20, 12 - 12, 17, 18, 19, 20, 79 - The range is 79

b) 14, 14, 16, 15, 1, 16 - 1, 14, 14, 15, 16, 16 - The range is 1

c) 98, 202, 99, 91, 2, 95, 89, 88, 94 - 2, 88, 89, 91, 94, 95, 98, 99, 202 - The range is 2 and 202


Page 437 - 439, # 1- 16 .... IS HOMEWORK!
*Reminder.. there is a math quiz tomorrow on Number of The Day, all 25 questions!

Tuesday, May 18, 2010

Measure of Central Tendency

Measure of central tendency
-is a value that represents the center of a set of data
-can be median, mode, mean

Remember:


-When given a set of data always reorder the digits from least to greatest.

Median
-the middle number in a set of data after the data has been arranged or ordered, only if there is an odd number of items in the dat
a

-if there is an even number of items in the data the sum of the 2 middle numbers in the data set are divided to get the total


eg. 2, 5, 6, 8, 9, -median is 6

1, 3, 6, 8, 9, 10 -median is 7
-----(6+8) ÷ 2 =
7

3, 8, 2, 6, 5, 4, -median is
4.5
2, 3, 4, 5, 6, 8,
----(4+5) ÷ 2 =
4.5

Mode
-the most frequent occurring number in the set of data

-if you find
no number that repeats most often, then there is no mode.

eg. 3, 5, 7, 7, 9 -mode is
7

2, 2, 4, 6, 6, 8, 11 -mode is
2 and 6


1, 2, 3, 4 -mode; there is no mode



Try this:


Montreal scored the following goals in their last 10 games

5, 4, 3, 2, 1, 5, 3, 3, 7, 3


-Find the median and the mode:

1, 2, 3, 3, 3, 3, 4, 5, 5, 7


----------(3+3)
÷ 2
= 3

median-
3
mode-
3

Frequency Table

8, 8, 8, 10, 10, 11, 11, 11, 14, 14

----------(10+11)
÷ 2 = 10.5

median- 10.5


mode- 8, 11


Mean
-a measure of rental tendency

-the sum (adding) of a set of data divided by the number of values in set



eg. 4, 5, 8, 9, 9


- 4+5+8+9+9=35
- 35
÷ 5 =7


Try this- mean, median, mode


a) 4, 5, 6, 7, 7, 8, 8, 9, 9

mean-7, median-7, mode-7



b) 250, 250 300, 300, 400


mean-300, median-300, mode-250, 300




Friday, May 14, 2010

Homework and extra practice

Your homework for the weekend is pages 426 - 427 numbers 1 - 17 plus the math link.

Try some of these problems for extra practice: Working With Data 1. List all the four-digit numbers that are even, have a 6 in the tens place, and whose digits add to 12. 2. Is 349 ´ 0.9 greater than, less than, or equal to 349? How do you know? ______________________________________________________________ ______________________________________________________________ 3. Suppose you know that 48 ÷ 16 = 3. Without finding the exact answer, tell whether the answer to 48 ÷ 15.99 is greater than, less than, or equal to 3. Why? ______________________________________________________________ ______________________________________________________________ 4. Use the multiplication below to answer the questions that follow. a) Can E be 2? Explain. ___________________________________________________________ ___________________________________________________________ b) What is the value of D? Why? ___________________________________________________________ ___________________________________________________________ c) What is the value of G? How do you know? ___________________________________________________________ ___________________________________________________________

Monday, May 3, 2010

Review: Solving One Step Algebra Equations

Apply the opposite operation

Remember
-an opposite operation is an operation that "undoes" another operation.
-subtraction and adding are opposites
-division and multiplication are opposites
-whatever you do one side you must do the same to the other side to maintain balance


1st step
- isolate the variable/get the letter by itself
2nd step- apply opposite operation
3rd step- check the answer, substitute the answer for the letter of the original equation

A+5=7
-5 -5
A=2
Check your answer:
A+5=7
2+5=7
7=7

To extend our knowledge, we had equations to solve:

a) b-3=5
- +3 +3
- b=8
Check your answer:
b-3=5
8-3=5
8=8

b) c÷3=7
- x3 x3
- c=21
Check your answer:
c÷3=7
21÷3=7
21=21

c) 4d=16
- ÷4 ÷4
- d=4
Check your answer:
4d=16
4(4)=16
16=16

Other examples:



















HOMEWORK
: Pg. 405=407 #1-21

Friday, April 30, 2010

Solving one-step equations

1. Using inspection, mental math

Eg. a + 4 = 12
8 + 4 = 12
12 = 12

Ask yourself what something + 4 = 12 or 12 - something = 4

Try these:

14 = k + 5
14 = 9 + 5

t - 3 = 11
14 - 3 = 11

10 - y = 8
10 - 2 = 8


2. Model (make a picture) and solve

Eg.


Bill rides 4 km to the bridge then rides to work. In total he rides 11 km. How far from the bridge to work?



4 + y = 11

4 + 7 = 11






3. Apply the opposite operation


Eg. c + 22 = 56
- 22 = -22
c = 34

Check- c + 22= 56
34 + 22 = 56
56 = 56



1st step - Isolate the variable (get the letter by itself)

2nd step - Apply the opposite operation

3rd step - Check your answer. Substitute the answer for the letter of the original equation



Opposite operation - An operation that "undoes" another operation
* subtraction and addition are opposites
* division and multiplication are opposites

Solve by applying the opposite operating - Check your answer:


1. n + 7 = 26
- 7 = -7
n = 19

Check - n + 7 = 26
19 +7 = 26
26 = 26

2. d - 3 = -5
+3 = +3
d = -2



Check - d - 3 = -5
(-2) - 3 = -5
-5 = -5








Page 398-401 # 1-22 is HOMEWORK!
http://www.mytextbook.ca/

Thursday, April 29, 2010

Math Playground

Try some of these games, during your long weekend.

http://www.mathplayground.com/

Tuesday, April 27, 2010

Soliving Equations

Solving Equations:

Equation - a mathematical statement with two expressions that have the same value.




2b + 1 is EQUAL to 5

one way is to for you to use a scale.


[ps , i am sorry I can not do a cup so I am going to draw a square instead]

1c + 4 = 5



1c + 4 = 5




Add Image

2c(cups) + 3 = 5



Writing expressions - the expression can be writen using a single constant,a single variable or a combination of operations with constants , variables, or numeral co efficent

2 - numerical co efficient
y - variable
7 - constant

Write the following Equation





c + 3 = 7


expression - 3 5
variable - c
numerical coefficiant - 3
constant is - 5




equation - 4 + 10
variable - c
numerical coefficiant -2
constant -4, and 10.

Show using cups + counters
four times a number minus five equals
write an expression or a eqution
I.D variables, numerical coeficents, constands

Websites :
http://www.studygs.net/equations.htm
http://www.sosmath.com/algebra/solve/solve0/solve0.html (might help with future reference.)

I am sorry but I couldn't find a video because they were too advanced




Thursday, April 15, 2010

Integers

Using a number line to add integers.

A vertical Number line.
Just in case:
Zero pair - A pair of integer chips with one chip representing +1 and 1 chip representing.
Opposite integers - Two integers with the same numeral but different signs.

(+2) + (+3) = 5
(-4) + (-2) = -6
(+3) + (-2) = 1

Positive Numbers move right. Negative numbers move left.
A number line can be vertical also.



Page 319 - 322 is homework! :]



Wednesday, April 14, 2010

April 14 2010 Integers

Zero Pair
-a pair of integer chips with one chip reperesenting +1 and -1.
eg. +1 -1
The pair represent 0 because
(+1) + (-1) = 0
Opposite Integers
-two integers with the same numeral (number) but different signs. (+ -)
eg. + + - -
+2 -2
You can use these symbols to help add positive and negative integers.
eg. + + + + + - - - + - zero
+ - zero
+ - zero
+ +1
+ +1
5 + (-3) =2
Show using chips
(+2) + (+3) (-1) + (-5) (+4) + (-2) (+3) + (-6)
++ +++ = ++2 - - - - - - - - -2 ++++ - - + - 0 +++ - - - - - - + - 0
++2 - -1 + - 0 + - 0
+ 1 - -1 + 1 + - 0
- -1 + 1 - -1
- -1 - -1
- -1
Here's a good video about adding and integers

Here's a link to a good site

http://www.mathsisfun.com/positive-negative-integers.html

Sorry about having no pictures something was wrong with saving it.

Remember!!!

Pg.313 to 315 is homework!!!

Comment and suggest if you see any mistakes. Thanks

Tuesday, April 13, 2010

Integers

Integers-positive and negative whole numbers and zero
*eg. 2, -6, 91, +103, -10000

..not integers. 3/4, +1/2 , 4/5, 0.1. -0.7, 91.3, 95%, -60%

Integers can be shown on a number line or using integer chips..

Monday, April 5, 2010

Create Circle Graphs

1. Construct(make, build) a circle
Use a string, compass or trace a circle.
2. Create the Central Angles
- central angle- is an angle formed by 2 radii
- the vertex of the angle is at the centre of the circle

















25% like strawberry
25% like vanilla
50% like chocolate

















Make a graph for the following info. 3 kids use the computer 1-3 days per week.
9 kids use the computer 0 days per week. 18 kids use the computer 4 or more days per week.

Step 1. Find out how many in total.
3+9+18= 30

Step 2. Convert to %
3 = 1 = 10 10% 1-3 days
30 10 100

9 = 3 = 30 30% 0 days
30 10 100

18 = 6 = 60 60% 4 or more days
30 10 100








%|degrees
100|360
50 | 180
25 | 90
10 | 36


Convert % to degrees.
10% of 360= 36 degrees
use a protractor to measure the central angle

30% of 360= 108 degrees
60% of 360= 216 degrees


Homework
Pages 296-297
Questions 4-13

Wednesday, March 24, 2010

Circle Graphs

A circle graph is a graph that represents data using sections of a circle.
Sector - A section of a circle formed by 2 radii and the arc of the circle connecting by 2 radii.




Eg. Circle Graph, favourite N.F.L teams


General

This is more specific




how many were asked? 5oo

Pets of students in Mr. W's class ( 24 students )



Questions.

1) What is the title of the graph? Pets of students in Mr. W's class ( 24 Students )

2) What are the different catagories of the graph? cat, dog, other, no pets.

3) How many percent of the class has a dog? 25%
How many students have a dog? 6

4) How many percent of the class has a cat? 33%
How many students have a cat? 8

5) What percent of the circle is represented by all sectors? 100%

Pages 290-291

http://ebook.mytextbook.ca ( just sign in if you're not finish. )

Link for Circle graphs.

http://cstl.syr.edu/fipse/tabbar/ReadCirc/REVCIRCL.HTM

Video;

http://youtube.com/watch?v=FfpUUAxQcPA

Sorry, just go to the link. it wouldn't let my upload it.
By the way, tell me what i need to improve on. Thaanks :)

Circle Graph March 24, 2010

Circle Graph
A circle graph is a graph that represents data using sections of a circle

Sector - A section of a circle formed by 2 radii and the arc of a circle connecting the 2 radii

Eg. Circle graph

Favourite NFL teams


General

More specific


How many were asked ? 500




Pets of students in Mr. W's Class (24 Students)


Questions

1)What is the Title? Pets of students in Mr. W's Class? Pets of students in Mr. W's Class (24 Students)
2)What are the different categories represented by the graph ? Cat,Dog,Other and No pet
3)What is the percent of the class has a dog?25%
How many students have a dog? 6
4)% of class with cat? 33%
How many students have a cat ? 8
5) What % of the circle is represented by all sectors? 100%
6)no.






Pages 290 - 291











*ps sorry , the pages didn't come up very well. ):
and if i need to improve something please tell me



Link

http://cstl.syr.edu/fipse/TabBar/ReadCirc/REVCIRCL.HTM


Video