Persamaan garis melalui (3,1) dan (-2,2)

x1 = 3
x2 = -2

y1 = 1
y2 = 2

rumus :
(y-y1)/(y2-y1) = (x-x1)/(x2-x1)
(y-1)/(2-1) = (x-3)/(-2-3)
(y-1)/1 = (x-3)/-5
-5(y-1) = 1(x-3)
-5y +5 = x -3
-x -5y +5+3 = 0
x + 5y -8 = 0