Asked by robin

find the value of r for a line that passes through the points (-4,3) and (r,-3) where m=2/3
Answered by oobleck
(-3-3)/(r+4) = 2/3
r = -13
or,
∆y/∆x = 2/3
∆y = -6, so ∆x = -9
-4-9 = -13