cara gimana sekarang dikumpulin

(2,-1) x- 2y + 6 = 0
* cari gradien
X - 2y + 6 = 0
-2y = -x - 6
Y = ½x + 3
M ( gradien) = ½
*cari gradien kedua
// ( sejajar) -> m1 = m2
½ = m2
* masukan rumus
(2, -1)
x1= 2
Y1 = -1
( y - y1 ) = m2 ( x - x1 )
( y -(-1)) = ½ ( x - 2 )
( y + 1) = ½ x - 1
Y + 1 = ½ x -1
Y = ½ x - 1 - 1
Y = ½ x -2 ( sama2 dikali 2)
2y = x - 4
2y - x + 4 = 0 ( D)