SOLUTION: how do i find the value of y so that the line passing through 2 points has the given slope? i have: (1,y),(2,4),slope/m = 1

Algebra ->  Graphs -> SOLUTION: how do i find the value of y so that the line passing through 2 points has the given slope? i have: (1,y),(2,4),slope/m = 1      Log On


   

Question 130306: how do i find the value of y so that the line passing through 2 points has the given slope? i have: (1,y),(2,4),slope/m = 1
Answer by solver91311(24713) About Me  (Show Source):
You can put this solution on YOUR website!
The slope is given by %28y%5B1%5D-y%5B2%5D%29%2F%28x%5B1%5D-x%5B2%5D%29. So just substitute the coordinates from the two points. It doesn't really matter, but I'm calling (1,y) P%5B1%5D and (2,4) P%5B2%5D.

%28y-4%29%2F%281-2%29

%28y-4%29%2F-1

But we are given that the slope equals 1, so:

%28y-4%29%2F-1=1

y-4=-1

y=3