Question 1057563
Hi there,
Gradient = y2 - y1/x2 - x1
Using (10,4) (-2,r) and m = -0.5
r - 4/-2 - 10  = -0.5
r - 4/-12 = -0.5
Cross multiply
r - 4 = -12 x -0.5
r - 4 = 6
r = 6 + 4
r = 10.
(10, 4)  (-2, 10)
10 - 4/-2 -10
6/-12 = -0.5
Hope this helps :-)