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-------- = ----------
y2 - y1 x2 - x1
y - 4 x +3
------- = ---------
-5 - 4 2 + 3
y - 4 x +3
------- = ----------
-9 5
5(y-4) = -9(x+3)
5y - 20 = -9x -27
5y + 9x = -27 + 20
9x + 5y = - 7 atau 9x + 5y + 7 = 0