persamaan garis yang melalui titik (-2,-3) dan bergradien ½ adalah

Titik (-2,-3) --> x1 = -2, y1 = -3
m = 1/2

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

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