SOLUTION: On my homework it says "Find the value of r so the line passes through each pair of points has the given slope" and one of the questions is (r,3), (5,9), m=2 I have no idea what

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Question 1008607: On my homework it says "Find the value of r so the line passes through each pair of points has the given slope" and one of the questions is (r,3), (5,9), m=2
I have no idea what to do because I was gone the day we learned this.
Found 2 solutions by josgarithmetic, MathTherapy:
Answer by josgarithmetic(39618)   (Show Source): You can put this solution on YOUR website!
Slope means, vertical change divided by horizontal change.

Variable m is often chosen for slope.
The formula for slope for two points (p,w) and (h,k) is .
Answer by MathTherapy(10552)   (Show Source): You can put this solution on YOUR website!
On my homework it says "Find the value of r so the line passes through each pair of points has the given slope" and one of the questions is (r,3), (5,9), m=2
I have no idea what to do because I was gone the day we learned this.
Formula for m, or slope: 

Therefore,  

In this case: (r, 3) is (), while (5, 9) is ()

Substitute to find r. 

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