The following data were collected during a study of consumer buying patterns: Observation x y Observation x y 1 18 69 8 19 81 2 26 81 9 14 75 3 41 85 10 10. 76 4 35 77 11 25 83 5 56 95 12 21 86 6 46 93 13 29 90 33 86 b. Obtain a linear regression line for the data.(Round your intermediate calculations and final answers to 3 decimal places.) y= X 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. Omit the "%" sign in your response.) 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 = 44. (Round your intermediate calculations and final answers to 3 decimal places.) y=