The data below represent commute times (in minutes) and scores on a well-being survey. Complete parts (a) through (d) below. Commute Time (minutes), x 5 20 30 35 60 84 105 0 Well-Being Index Score, y 69.1 67.6 66.6 66.2 64.4 63.4 61.2 . . . (a) Find the least-squares regression line treating the commute time, x, as the explanatory variable and the index score, y, as the response variable. y = x + () (Round to three decimal places as needed.)