An instructor asked a random sample of eight students to record their study times in a beginning calculus course. She then made a table for total hours studied (x) over 2 weeks and test score (3!) at the end of the 2 weeks. Here are the results. Use the information to complete parts (a) through (9). x 1 0 1 5 1 2 20 8 1 6 1 4 22 % y 92 80 83 75 86 79 85 79 a. Find the regression equation for the data points. 9= + ( x (Round to three decimal places as needed.)