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(y -y1) / (y2- y1) = (x - x1) / (x2 - x1)
Mel K (3,11) dan L (-2, -4)
y-11 / -4-11 = x - 3 / -2 -3
y-11 / -15 = x-4 / -5
-5. (y-11) = -15 (x- 4)
-5y + 55 = -15x + 60
-5y = -15x + 60 -55
-5y = -15 x + 5
y = 3x - 1 (B)