Question

Question 2 17 pts

The data in the table show the number of dasses offered at two different schools. Find the correlation
coefficient and the equation of the line of best fit for the data. Treat the number of classes in School A as
the independent variable.
Class
1
II
III
IV
V
VI
VII VIII IX
School A
25
24
30
27
35
35
46
50
42
School B
20
20
20
29
34
39
29
34
50
Orx0.37
B 0.56 A +17.68
Orx0.37
BS 0.65A+7.91
Or0.60
BR 0.56A +17.68
Or $0.60
B 0.65 A+7.91

Answer 1

r=0.60

B=0.65A + 7.91

Explanation:

Use a graphing calculator to find the correlation coefficient.

Enter the class data for school A into the list L1 and the class data for school B into the list L2.

Calculate the linear regression model and find the correlation coefficient by pressing STAT, choosing CALC, and selecting 4:LINREG.