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m : -3/4
maka gradien garis (-1,2) adalah 4/3
y-y1 = m(x-x1)
y-2 = 4/3 (x + 1)
y -2 = 4/3x + 4/3
y = 4/3x + 10/3
y - 4/3x - 10/3 : 0 (semua dikali 3)
3y - 4x - 10 : 0