26. The following data were collected during a study of consumer buying patterns: Observation X y 1 15 74 2 25 80 3 40 84 4 5 6 7 8 9 10 11 12 25223 33 32 81 51 96 47 95 30 83 18 78 14 15 22 24 ON 188 90 70 72 85 13 1. Plot the data. 2. Obtain a linear regression line for the data. 3. What percentage of the variation is explained by the regression line? 4. Use the equation determined in part b to predict the expected value of y for x=41.