An instructor gives regular 17-point quizzes and 100-point exams in a mathematics course. Average scores for six students, given as ordered pairs (x, y) where x is the average quiz score and y is the average test score, are (10, 59), (15, 89), (16, 91), (13, 80), (6, 45), and (8, 54).

(a) Use the regression capabilities of a graphing utility to find the least squares regression line for the data. (Round your coefficients to three decimal places.)