Biologists within a national park use the fall rabbit population as a predictor of the following spring's fox population. In the fall of 2005 the rabbit population was 500 rabbits and in the spring of 2006 the fox population was 90. The statistical analysis predicted that there would be 104 foxes. Calculate the residual for that data point.

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