Page 194 - IM_Algebra1_FL Print Sample.pdf
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height in feet ( )
height in inches ( )
5.5
66
5.25
63
5
60
5.5
66
6
72
5.8
70
5.9
71
6.25
75
5.4
65
5.1
61
4.9
59
5.7
68
5.75
69
5.9
71
5.5
66
The equation of the line of best t is and the correlation coe cient is 0.999. Since there is a direct conversion between the units, we expect there to be a strong, positive relationship between the variables.
Although it is not perfect ( not 1) due to rounding, the best t line models the data very well, so there is a strong relationship between height in feet and height in inches. Since an increase in one of the values is paired with an increase in the other, there is a positive relationship.
Give students 10 minutes of work time to work the questions.
Unit 3 Lesson 8: Using the Correlation Coe cient 127
