HW: Pg. 86-87 # 34-36, 43-45, 61

HW: Pg. 95-97 # 14-58 eoe, 59

Pg. 89 #1-10

Pg. 106 #1-4

2.5 Correlation and Best-Fitting Lines

Telephones Describe the correlation shown by each scatter plot.

Positive correlation, increasing

slope

Negative correlation, decreasing

slope

2.5 Animated Activity Online

CORRELATION OF X & Y:http://www.classzone.com/cz/books/algebra_2_2007_na/resources/applications/animations/explore_learning/chapter_2/dswmedia/5_4_correlations.html

2.5 Correlation and Best-Fitting LinesFor each scatter plot, (a) tell whether the data have a positive correlation, a negative correlation, or approximately no correlation, and (b) tell whether the correlation coefficient is closest to –1, – 0.5, 0, 0.5, or 1.

1.

ANSWER

1. (a) positive correlation

1. (b) r = 0.5

2.

ANSWER

2. (a) negative correlation

2. (b) r = –1

3.

ANSWER

3. (a) no correlation

3. (b) r = 0

2.5 Correlation and Best-Fitting Lines

2.5 Correlation and Best-Fitting Lines

ANSWER

Draw a scatter plot and approximate the best-fitting line for the data.

52 28 24 310 2 8

(28) ( ) 28 3 6

28

3 2

y 2

3

+28

2

y xy

m

x

x

2.5 Animated Activity Online

GRAY WHALE MIGRATION:http://www.classzone.com/cz/books/algebra_2_2007_na/resources/applications/animations/explore_learning/chapter_2/dswmedia/alg207_ch02_pg111.html

Homework:

Pg. 103-104 # 8-20e