Define the following :

Translation : slide across a straight line

Rotation : A turn at a fixed point call Center of Rotation .

Reflection : A flip over a mirror line.

* Mirror can be anywhere; doesn't have to be on an axis .

Reminder : There is only 12 days of school left before exams, start studying tonight, and don't procrastinate to the last minute.

## Monday, May 31, 2010

## Tuesday, May 25, 2010

### The Best Measure of Central Tendency

Choose the best measure of central tendency .

Find Mean, Median, Mode, and Range .

How many shirts should I buy for the next 30 weeks ?

Need help ? Check this link .

**Im sorry guys cant find a video !**

**HOMEWORK**

**PG. 449 - 451**

## Monday, May 24, 2010

### Review and Effects on Outliers

REMINDER !

Always Re-order before figuring out all measurements of tendency.

mean: All the numbers added together, divide by home much digits.

median: the middle number OR (if there is no middle number) add the two middle

numbers and divide by 2.

mode: the most number(s) there.

range: diffrence between the largest and smallest values in a data set.

outlier: number(s) that don't really fit with that data set.

Find the mean, median, mode, range, and outlier(s).

a) 12, 20, 18, 15, 10, 12.

b) 48, 32, 67, 61, 47, 95, 89, 888, 1.

a) re-order: 10, 12, 12, 15, 18, 20.

mean: 14.50

median: 13.5

mode: 12

range: 10

outlier(s): No outliers

b) re-order: 1, 32, 47, 48, 61, 67, 89, 95, 888.

mean: 166

median: 61

mode: no mode

range: 887

outlier(s): 888 and 1

Here is a video that covers: mean, median, mode and range.

Here is a video that covers: range and outlier(s).

Effects on Outliers

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

- Outliers have an effect on ALL measurements of tendency.

HOMEWORK !

PAGES 444 - 445 NUMBERS 1 to 8 !

ALSO, Don't forget, we need to hand in our Number of the Day! So make sure you're done all of it to get a good mark ! :)

Always Re-order before figuring out all measurements of tendency.

mean: All the numbers added together, divide by home much digits.

median: the middle number OR (if there is no middle number) add the two middle

numbers and divide by 2.

mode: the most number(s) there.

range: diffrence between the largest and smallest values in a data set.

outlier: number(s) that don't really fit with that data set.

Find the mean, median, mode, range, and outlier(s).

a) 12, 20, 18, 15, 10, 12.

b) 48, 32, 67, 61, 47, 95, 89, 888, 1.

a) re-order: 10, 12, 12, 15, 18, 20.

mean: 14.50

median: 13.5

mode: 12

range: 10

outlier(s): No outliers

b) re-order: 1, 32, 47, 48, 61, 67, 89, 95, 888.

mean: 166

median: 61

mode: no mode

range: 887

outlier(s): 888 and 1

Here is a video that covers: mean, median, mode and range.

Here is a video that covers: range and outlier(s).

Effects on Outliers

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

- Outliers have an effect on ALL measurements of tendency.

HOMEWORK !

PAGES 444 - 445 NUMBERS 1 to 8 !

ALSO, Don't forget, we need to hand in our Number of the Day! So make sure you're done all of it to get a good mark ! :)

Labels:
May21,
Review and Effects on Outliers,
Thessa44

## Wednesday, May 19, 2010

### Range and Outliers

Range - the positive difference between the largest and smallest values in a data set.

Outlier - a value that is smaller or larger than the other data value.

- a data set may have one or more outliers or no outliers.

**Find the range:**

**a) 7, 4, 3, 6, 2, 5, 8, 3 ----> 2, 3, 3, 4, 5, 6, 7, 8 ----> 8-2 = 6**

**b) 11, 8, 8,5, 7, 6, 7, 6, 6---->5, 6, 6, 6, 7, 7, 8, 8,11--->11-5=6**

**c) -4, 3, -1, 0, 2 ----> -4, -1, 0, 2, 3 ----> 3-(-4) = 7**

**Find the outliers:**

**a) 18, 19, 79, 17, 20, 12 ---> 12, 17, 18, 19, 20, 79 ---> 79**

**b) 14, 14, 16, 15, 1, 16 ---> 1, 14, 14, 15, 16, 16 ---> 1**

**c) 98, 202, 99, 91, 2, 95, 89, 88 ---> 2, 88, 89, 91, 95, 98, 99, 202 ---> 2 and 202**

**HOMEWORK:****Page 437 - 439****# 1 - 16**
Labels:
Hazel Turdanes,
Hazel44,
May 19/ 2010,
Range and Outliers

## Monday, May 17, 2010

### How To Find The Mean

Mean - A measure of a central tendency

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

Try This

i took this video from joshua..

Homework:

Textbook pages 431-433 # 1-16

## 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?

___________________________________________________________

___________________________________________________________

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?

___________________________________________________________

___________________________________________________________

## Thursday, May 13, 2010

### Measures of Central Tendency

Tests out of 10

8, 9. 4, 5, 9 set of data

4, 5, 8, 9, 9 re order from least to greatest

Dude says 8 is the best representative of the test scores because 8 is in the middle

Chick says 9 is the best rep because it shows up the most

Measure of Central Tendency - is the value that represents the centre of a set of data. You can find the mean, median, or 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 together then divide by 2

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

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

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

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

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

Montreal scored the following goals in their last 10 games

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

Find Mode and Median

Find the Mode and Median of each set of values

a) 4, 2, 6, 9, 4

b) 11, 5, 8, 11, 10

c) 4, 5, 8, 5, 5, 8, 5, 7

d) 14, 6, 14, 8, 10, 6, 10

Find Mode and Median:

8, 9. 4, 5, 9 set of data

4, 5, 8, 9, 9 re order from least to greatest

Dude says 8 is the best representative of the test scores because 8 is in the middle

Chick says 9 is the best rep because it shows up the most

Measure of Central Tendency - is the value that represents the centre of a set of data. You can find the mean, median, or 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 together then divide by 2

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

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

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

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

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

Montreal scored the following goals in their last 10 games

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

Find Mode and Median

Find the Mode and Median of each set of values

a) 4, 2, 6, 9, 4

b) 11, 5, 8, 11, 10

c) 4, 5, 8, 5, 5, 8, 5, 7

d) 14, 6, 14, 8, 10, 6, 10

Find Mode and Median:

H.W.

Find Mode and Median:

If you need help click this link

If you still need help watch this video:

http://www.youtube.com/watch?v=81zcjULlh58

Mr. Isfeld's best friend is your guest teacher tomorrow. Make sure you are the best class in the world !

## Tuesday, May 11, 2010

### Math & Homework

This diagram shows that a cabin with 1 room has 2 doors, a cabin with 2 rooms has 5 doors, and a cabin with 3 rooms has 8 doors.

y = 4x + 2 Create a real life pattern.

Solve for x when y = 100

If you need help click this link

H.W.

a) 10 = x + 6

b) x + 6 = 8

c) x - 2 = 9

d) x - 4 = 5

e) 2x + 1 = 7

f) 4x - 2 = 12

g) x divided by 4 + 3 = 9

h) x divided by 6 - 5 = 1

## Thursday, May 6, 2010

## Monday, May 3, 2010

### Algebra and Probability Review

What is the probability of rolling a 6 with one die and landing a coin on heads? Show a tree diagram to explain your answer.

Solving one step algebra equations

Labels:
ALGEBRA,
Hazel44,
MAY 3 2010,
probability,
TODAY IN CLASS

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