Problem 3-26 (Algo) The following data were collected during a study of consumer buying patterns Observation 1 2 70 20 30 37 29 47 45 31 Observation 8 9 10 11 12 13 x 14 12 17 18 26 29 80 81 94 98 81 4 5 y 79 72 67 82 92 89 Book 6 7 Click here for the Excel Data File references b. Obtain a linear regression line for the data.(Round your intermediate calculations and final answers to 3 decimal places.) 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 42. (Round your intermediate calculations and final answers to 3 decimal places.)