persamaan garis yang melalui titik (5,-5) dan titik (-5,1)

y - y1/y2 - y1 = x - x1/x2 - x1
y - (-5)/1 - (-5) = x - 5/-5 - 5
y + 5/1 + 5 = x - 5/-10
y + 5/6 = x - 5/-10
-10(y + 5) = 6(x - 5)
-10y - 50 = 6x - 30
-10y - 6x - 50 + 30 = 0
-10y - 6x -20 = 0
-5y - 3x -10 = 0
5y + 3x + 10 = 0