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Verified answer
Y = xm = 1
syarat tegak lurus
m1 . m2 = - 1
1 . m2 = - 1
m2 = - 1
pers garis lurus
y - y1 = m (x - X1)
y + 8 = - 1 (x - 4)
y = - x + 4 - 8
y = - x - 4 (B)