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The following data were collected during a study of consumer buying patterns: Observation 1 2 3 3 4 5 6 7 x 20 29 36 37 48 43 30 Y 69 78 83 81 96 92 87 Observation 8 9 10 11 12 13 13 15 10 17 23 34 Y 81 68 67 87 87 92 Click here for the Excel Data File b. Obtain a linear regression line for the data.(Round your intermediate calculations and final answers to 3 decimal places.) y = + c. What percentage of the variation is explained by the regression line? (Do not round intermediate calculations. Round your answer to the nearest whole percent.) Approximately % of the variation in the dependent variable is explained by the independent variable. d. Use the equation determined in part b to predict the expected value of y for x= 45. (Round your intermediate calculations and final answers to 3 decimal places.) y = The following data were collected during a study of consumer buying patterns: Observation 1 2 3 3 4 5 6 7 x 20 29 36 37 48 43 30 Y 69 78 83 81 96 92 87 Observation 8 9 10 11 12 13 13 15 10 17 23 34 Y 81 68 67 87 87 92 Click here for the Excel Data File b. Obtain a linear regression line for the data.(Round your intermediate calculations and final answers to 3 decimal places.) y = + c. What percentage of the variation is explained by the regression line? (Do not round intermediate calculations. Round your answer to the nearest whole percent.) Approximately % of the variation in the dependent variable is explained by the independent variable. d. Use the equation determined in part b to predict the expected value of y for x= 45. (Round your intermediate calculations and final answers to 3 decimal places.) y =