Point-slope form : y-y₁=m(x-x₁) ; Where m=slope
Passes through (6, -8) ; Slope is -2
Simply plug everything in :)
y - (-8) = -2(x - 6)
Simplify.
y + 8 = -2x + 12 → Answer
The answer from Openstudy is incorrect, because our slope is negative, not positive.
~Hope I helped!~