persamaan garis yg melalui titik (-7,12) dan gardien 5/2

y - y1 = m (x - x1)
y - 12 = 5/2 (x -(-7)
y - 12 = 5/2 (x + 7)
2y - 24 = 5(x + 7)
2y - 24 = 5x + 35
2y = 5x + 59
2y - 5x - 59 = 0