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SMP Kelas VIII
melalui titik (-2, -4) dan (-4, 3)
(y - y1) / (y2 - y1) = (x - x1) / (x2 - x1)
(y - (-4)) / (3 - (-4)) = (x - (-2)) / (-4 - (-2))
(y + 4) / 7 = (x + 2) / (-2)
-2(y + 4) = 7(x + 2)
-2y - 8 = 7x + 14
-2y = 7x + 14 + 8
-2y = 7x + 22
7x + 2y = -22