Persamaan garis yang melalui titik (-3,6) dan (1,4)

{(y-y1)/(y2-y1)} = {(x-x1)/(x2-x1)}
{(y-4)/(6-4)} = {(x-1)/(-3-1)}
2((x-1) = (-4)(y-4)
2x-2 = -4y+16
2x + 4y - 18 = 0
x + 2y - 9 = 0