Question 1057563: Determine the value of r so the line that passes through each pair of points has the given slope .
(10,4),(-2,r), m=-0.5
Answer by Cromlix(4381)   (Show Source):
You can put this solution on YOUR website! 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 :-)
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