Answer:
B
Explanation:
Calculate the slope m using the slope formula and equate to
m =
with (x₁, y₁ ) = (3, 2) and (x₂, y₂ ) = (r, - 4)
m =
=
, then equating gives
=
( cross- multiply )
3(r - 3) = - 12 ( divide both sides by 3 )
r - 3 = - 4 ( add 3 to both sides )
r = - 1 → B