hitunglah gradien garis yang melalui titik (-2,-1) dan (-4,3).

(-2, -1) misalkan (x1, y1)
(-4, 3) misalkan (x2, y2)

gradien (m) = (y2 - y1)/(x2 - x1)
= (3 - (-1))/(-4 - (-2))
= 4/-2 = -2