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y1 = 2
x2 = -1
y2 = -3
y-y1/y2-y1 = x-x1/x2-x1
y-2/-3-2 = x-1/-1-1
y-2/-5 = x-1/-2
(y-2)-2 = (x-1)-5 (kali silang)
-2y+4 = -5x +5
-2y = -5x + 1
atau -2y+5x = 1
atau -2y+5x-1 = 0
atau -y = -5/2x + 1/2
atau y = 5/2x - 1/2 (dikali -1)
=
=
= 5/2
y-y1 /y2-y1 = x-x1 / x2-x1
y - (-1) / (-3)-2 = x - 1 / (-1) - 1
y + 1 /-5 = x - 1 / -2
-2(y+1) = -5 (x-1)
-2y - 2 = -5x + 5
5x - 2y = 5 + 2
5x - 2y = 7