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mAB= koefisienX/koefisienY
= -3/4
cara menentukan persamaan garis:
y-y1=m(x-x1)
y-2=-3/4(x-(-1))
y-2=-3/4x-3/4
4y-8=-3x-3(x4)
3x+4y-8+3=0
3x+4y-5=0
jawaban=c