(15,-25)(-12,11) slope = (11 - (-25) / (-12 - 15) = - 36 / 27 which reduces to - 4/3
y = mx + b slope(m) = -4/3 use either of ur points (15,-25)...x = 15 and y = -25 now we sub and find b, the y int -25 = -4/3(15) + b -25 = - 20 + b -25 + 20 = b -5 = b