SOLUTION: Find the value of r so that the line passes through each pair of points has the given slope. (-7,2)(-8,r), m=-5. Prove your answer by graphing it.

SOLUTION: Find the value of r so that the line passes through each pair of points has the given slope. (-7,2)(-8,r), m=-5. Prove your answer by graphing it.

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Question 686590: Find the value of r so that the line passes through each pair of points has the given slope. (-7,2)(-8,r), m=-5. Prove your answer by graphing it.
Answer by rfer(16322) (Show Source): You can put this solution on YOUR website!
-5=(2-r)/(-7--8)
-5=(2-r)/1
-5=2-r
-5-2=-r
r=7
---------------
proof
m=(2-7)/(-7--8)
m=-5/1
m=-5
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