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jadi 6y = -2x + 12 (semua dibagi 6 supaya 6y menjadi y)
y = -1/3x + 2
rumusnya y = mx + c
jadi m = -1/3
karena tegak lurus = m1.m2 = -1
-1/3 . m2 = -1
m2 = 3
masuk ke rumus y-y1 = m(x-x1)
y - (-2) = 3 (x - (-4))
y +2 = 3x +12
y = 3x +12 - 2
y= 3x + 10
y -3x - 10 = 0
semoga membantu, maaf jika salah
dikatakab tegak lurus maka m2= 3 (kebalikan dari m1)
maka,
y-y1=m2 (x-x1) --- x1 : -4 y1 : -2
y- (-2) = 3 (x-(-4))
y + 2 = 3x + 12
3x + 12 - y - 2 =0
3x - y + 10 = 0