Mr Stat is hoping to determine if he can predict the score of a test based on the number of hours a student used to prepare. The test scores of 6 randomly picked students and number of hours they prepared are as follows: Hours 5 10 4 6 10 9 Score 74 91 69 86 95 87 a) What is the explanatory variable? b) What is the response variable? c) What is the regression equation? (Use y for the response variable and x for the explanatory variable.) d) What is the correlation coefficient, r? (Round answer to 3 decimal places.) e) What is the coefficient of determination, r2 ? (Write as a decimal rounded to 3 decimal places.)