SOLUTION: find the value of r so the line that passes through each pair of points has the given slope. (r,3) (5,9), m=2

Algebra ->  Linear-equations -> SOLUTION: find the value of r so the line that passes through each pair of points has the given slope. (r,3) (5,9), m=2      Log On


   

Question 804311: find the value of r so the line that passes through each pair of points has the given slope.
(r,3) (5,9), m=2
Answer by erica65404(394) About Me  (Show Source):
You can put this solution on YOUR website!
%28y%5E2-y%5E1%29%2F%28x%5E2-x%5E1%29=m
plug the information given in order to find r.
%289-3%29%2F%285-r%29=2
6%2F%285-r%29=2
cross multiply
6=2%285-r%29
6=10-2r
-4=-2r
r=2