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