persamaan garis yang melalui titik (-2, -3) dan gradien 1/2

y - y1 = m (x - x1)
y - (-3) = 1/2 (x - (-2))
y + 3 = 1/2 (x + 2)
____________ ×2
2y + 6 = x + 2
2y - x + 6 - 2 = 0
2y - x + 4 = 0


semoga membantu yaa;)

y - y1 = m(x - x1)
y - 3 = 1/2(x + 2)
y - 3 = 1/2x + 1
y = 1/2x + 1 + 3
y = 1/2x + 4
2y = x + 8
2y - x = 8