buat persamaan garis melalui (-2,3) dan tegak lurus garis 2×-3y+4=0

2x - 3y = -4
m1 = -a/b
= -2/-3
= 2/3
m1 × m2 = -1
2/3 × m2 = -1
m2 = -3/2

y - y1 = m (x - x1)
y - 3 = -3/2 (x + 2) --> kali 2
2y - 6 = -3 (x + 2)
2y - 6 = -3x - 6
2y + 3x = 0