the last question is giving me trouble and i'm not sure if my other answers are right

This test is for Units I through N. Please make sure you are writing out your work on scrap paper for partial credit to be assigned. Question 1- 10 Points 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 7.3 Score |74 91 69 86 95 87 83.7 a) What is the explanatory variable? [A] hours b) What is the response variable? [B] score c) What is the regression equation? [C] (Use y for the response variable and x for the explanatory variable.) d) What is the correlation coefficient, r? [D] (Round answer to 3 decimal places.) Y = 7. 3 x + Q.00! e) What is the coefficient of determination, r2 ?[E] (Write as a decimal rounded to 3 decimal places.)