The following data were collected during a study of consumer buying patterns: Observation 8 9 Observation 4 5 6 7 11 22 Approximately 36 29 y 73 75 81 86 53 97 51 99 30 79 10 11 12 13 21 16 16 26 19 35 y 78 72 69 BO 91 87 b. Obtain a linear regression line for the data. y= c. What percentage of the variation is explained by the regression line?! % 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 y=