Question

PLEASE HELP!!

Find the value of r so that the line through (2,8) and (r,-4) has a slope of -3

Answer 1

r=6

Explanation:

`m=(y2-y1)/(x2-x1)`

m= -3

(2,8) (r,-4)

`-3=(-4-8)/(r-2)`

`-3r+6=-12`

`-3r=-18`

r= 6