Question

Given P(-5,-8), Q(-1, -9), R(-1,-1), and S(x,-3). Find x such that PQ ll RS. Please help!!​

Answer 1

slope of PQ = (-9 - (-8))/(-1 - (-5)) = -1/4

slope of RS = (-3 - (-1))/(x - (-1)) = -1/4

-2/(x + 1) = -1/4

x + 1 = 8

x = 7