Solve for

Question

a if the line through the two given points has the given slope.
(4,a) and (-2,-2a), m=-1

Answer 1

(Y2 - Y1) / (X2-X1) = -1

(-2a - a ) / (-2 -4) = -1
-3a = 6
a = -2
now put that back in and see if it works