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 15 25 35 50 72 105 68.3 67.4 67.0 66.2 65.8 63.4 Well-Being Index Score, y 5 69.2 (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.)

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