Question: X 10. The following data were collected during a study of consumer buying patterns: Observation y Observation X y 1 1972 8 20 77 2

X 10. The following data were collected during a study of consumer buying patterns: Observation y Observation X y 1 1972 8 20 77 2 2181 9 17 73 3 43 79 10 1377 4 2881 11 20 85 5 5698 12 28 93 6 4996 13 34 94 7 3282 14 a. Obtain a linear regression line for the data. b. What percentage of the variation is explained by the regression line? Use the equation determined in part b to predict the expected value of y for x = 49. c

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