Slope between (x1,y1) and (x2,y2) is (y2-y1)/(x2-x1) we are given the points (-2,7) and (x,2) slope is -1/3 so (x,y) (-2,7) and (x,2) x1=-2 y1=7 x2=x y2=2
slope=(2-7)/(x-(-2))=-1/3 slope=(-5)/(x+2)=-1/3 multiply both sides by (-3)(x+2) (basically cross multiply) 15=x+2 minus 2 both sides 13=x x=13 the value of x is 13
