The following data were collected during a study of consumer buying patterns: Observation y 1 15 74 2 25 80 3 40 84 4 32 81 51 96 6. 47 95 7 30 83 8. 18 78 9. 14 70 10 15 72 11 22 85 12 24 88 13 33 90 1. Plot the data. 2. Obtain a linear regression line for the data. 3. What percentage of the variation is explained by the regression line? 4. Use the equation determined in part b to predict the expected value of y for x= 4

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