Melalui titik(3,-2)dan tegak lurus garis x-3y=2

Bab Persamaan Garis
Matematika SMP Kelas VIII

ax + by = c, tegak lurus, (p, q)
bx - ay = bp - aq

x - 3y = 2, tegak lurus, (3, -2)
-3x - y = (-3) . 3 - 1 . (-2)
-3x - y = -9 + 2
-3x - y = -7
3x + y = 7