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y₂ -y₁ x₂ -x₁
y -(-1) = x -(-3)
-4 -(-1) -5 -(-3)
y +1 = x +3
-4 +1 -5 +3
y +1 = x +3
-3 -2
-2(y +1) = -3(x +3)
-2y -2 = -3x -9
-2y = -3x -9 +2
-2y = -3x -7
atau
3x -2y +7 = 0
=-4 - (-1) / -5 - (-3)
=-3 / -2 = 3/2
jadi, gradienya = 3/2