SOLUTION: The line thought the two points (x,-8) and (3,5) has a slope of -7/2. Find the missing coordinate.

Algebra ->  Coordinate-system -> SOLUTION: The line thought the two points (x,-8) and (3,5) has a slope of -7/2. Find the missing coordinate.      Log On


   

Question 826886: The line thought the two points (x,-8) and (3,5) has a slope of -7/2. Find the missing coordinate.
Answer by tommyt3rd(5050) About Me  (Show Source):
You can put this solution on YOUR website!
m=%28y%5B2%5D-y%5B1%5D%29%2F%28x%5B2%5D-x%5B1%5D%29
so...

-7%2F2=%28-8-5%29%2F%28x-3%29
and then we write

x-3=%28-2%2F7%29%28-13%29

x=26%2F7%2B21%2F7
x=47/7