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y2-y1 x2-x1
y-4 = x-(-5)
2-4 -2- (-5)
y-4 = x+5
-2 3
3 (y-4) = -2 (x+5)
3y-12 = -2x-10
3y-12+12 = -2x-10+12
3y = -2x+2
3y:3 = (-2x+2) : 3
y = -2/3x+2/3
maaf kalo salah ya..