An instructor asked a random sample of eight students to record their study times at the beginning of a course. She then made a table for total hours studied (x) over 2 weeks and test score (y) at the end of the 2 weeks. The table is given below. Complete parts (a)

through (f).

x 12 13 12 21 9 15 14 21 y 95 84 88 77 89 75 88 85