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 15 25 35 6O 72 105 D Well-Being Index Score, y 69.2 68.2 67.3 66.9 65.6 65.7 63.4 E) (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.)