(4 points) Given the following data set, let x be the explanatory variable and y be the response variable. x 7 1 5 8 1 8 5 y 3 10 5 3 9 2 7 (a) If a least squares line was fitted to this data, what percentage of the variation in the y would be explained by the regression line? (Enter your answer as a percent.) ANSWER: % 0)) Compute the correlation coefficient: r =