The following data were collected during a study of consumer buying patterns:
observation
x
y
observation x
y
1
15
74
818
78
2
25
80
914
70
3
40
84
1015
72
4
32
81
1122
85
5
51
96
1224
6
47
95
1333
90
7
30
83
a. plot the data.
b. obtain a linear regression line for the data.
c. what percentage of the variation is explained by the regression line?
d. use the equation determined in part b to predict the expected value of y for x = 41.
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