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 30 40 60 84 105 well-being index score, y 69.1 68.0 66.8 66.1 64.9 64.1 62.0 (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.

Given the system of equations presented here: 2x + 4y = 14 4x + y = 20 which of the following actions creates an equivalent system such that, when combined with the other equation, one of the variables is eliminated? multiply the second equation by â’4 to get â’16x â’ 4y = â’80 multiply the second equation by â’1 to get â’4x â’ y = â’20 multiply the first equation by 2 to get 4x + 8y = 28 multiply the first equation by â’1 to get â’2x â’ 4y = â’14