tolong ya no.3 saja pliss

Persamaan garis mlalui (x1,y1) dan TEGAKLURUS ax + by + c = 0

bx - ay = bx1 - ay1

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mlalui (x1,y1) = (1,3)
Tegaklurus 2x - 3y - 4 = 0

Persamaan garis :
bx - ay = bx1 - ay1
-3x - 2y = -3(1) - 2(3)
-3x - 2y = -9 ✔