Write the equation in Ax+By=C

Question

M=-3, (-5,-8) what is this in Ax+By=C form

Answer 1

-8 = -3(-5) + b

-8 = 15 + b

b = -23

y = -3x - 23

3x + y = -23

or..

y - (-8) = -3(x - (-5))

y + 8 = -3x - 15

3x + y = -23