## Tuesday, June 15, 2010

### Exam Reveiw

Define the following:

Variable: A letter that represents an unknown number.

Example: A,B,C

Equation: A mathematical statement with two expression that have the same value
.
Example: 1+1=2

Expression: Any single number or variable or a combination of operations involving numbers and variable.

Example: 2x2x2

Find and Describe the pathern,Identify the 3 terms.

64,58,52,46,.......40,34,28

As you see the pathern is that the number decreases by 6.

Define the following:

Mean: The mean is the average of the whole the data.

Example: The average of the this data is 78.6

67,75,78,84,89

Median: The median is the middle number of the data after it is arranged.

Example:10,4,9,5,2,8,1,3,6,7 after it was been arranged 1,2,3,4,5,6,7,8,9,1o the middle number is 5. 1,2,3,4,5,6,7,8,9,10.

Mode: The mode is the number that showed up the most in the data.

Example:12,33,25,44,33,19,65,78,33. The mode in this data is 33 because it shows up the most.

Outlier: An outlier is a number that is too small or big compared to data.

Example: 10,12,16,17,19,24,1999. The outlier is 1999 because it is way too big compared to rest of the data.

Range: The range is the difference of the biggest number and the lowest number in the data.(Positive)

Example: 23,67,89,25,100,13,7. The range of this data is 93. 100-7=93.

Here is website.
http://staff.argyll.epsb.ca/jreed/math7/strand4/4104.htm

1. Nice post Aldrin. It looks very organized. Next time use different colors for the important words because you only used a different color for only a few of the important words. Other than that, great job!

2. Good job Meljohn! It's very neat and organized. Next time try make the picture a little bigger and also try to use more colours.

3. Nice post Mel john.It looks very neat and organized.Next time use different colors for the important words and try make the picture a little bigger.

4. Nice job Meljohn! It looks very neat and organized.Nezt time try to use different colours for important words.

5. good job Meljohn your post is very well prepared and the video you posted was very helpful.Next time make the words bigger

6. Good Job! It was very neat. next time you should add more colour and make the words bigger.

7. Nice post Meljohn. It is very neat and easy to understand. Next time you should try not to leave to much space in between the words and add a little more colour. Other than that, great job.

8. Great job, Meljohn!! your post was neat, but next time you should add more colour to the important words. Other tahn that great job!!!

9. Thank you for posting all the notes, I didnt get all of it. Anyways, good job.I like the pictures. Good Job (: