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

Algebra ->  Coordinate-system -> 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      Log On


   

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) About Me  (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 m=%28w-k%29%2F%28p-h%29.

Answer by MathTherapy(10552) About Me  (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: %28y%5B1%5D+-+y%5B2%5D%29%2F%28x%5B1%5D+-+x%5B2%5D%29

Therefore, %28y%5B1%5D+-+y%5B2%5D%29%2F%28x%5B1%5D+-+x%5B2%5D%29+=+2 

In this case: (r, 3) is (x%5B1%5D%22%2C%22y%5B1%5D), while (5, 9) is (x%5B2%5D%22%2C%22y%5B2%5D)

Substitute to find r.