Persamaan garis (-3,5) dan (1,-4)

Mapel : Matematika
Bab : PGL

y - y1/y2 - y1 = x - x1/x2 - x1
y -5/ -4 -5 = x + 3 /-4 + 3
y - 5 / -9 = x + 3 / -1
-1(y - 5) = -9(x + 3)
-y + 5 = -9x - 27
9x - y = -28 - 5
9x - y = -33