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 Well-Being Index Score, y 69.3 68.1 67.3 67.2 66.0 65.6 64.0 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.