Problem 3-26 The following data were collected during a study of consumer buying patterns: Observation y 78 16 72 16 Observation lonx y 11 73 22 75 36 81 2986 53 97 51 99 30 79 10 11 26 80 12 13 35 87 b. Obtain a linear regression line for the data.(Round your intermediate calculations and final answers to 3 decimal places.) y=C + C 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= 49. (Round your intermediate calculations and final answers to 3 decimal places.) y=L