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y₂ -y₁ x₂ -x₁
y -(-4) = x -(-3)
-6 -(-4) -5 -(-3)
y +4 = x +3
-2 -2
-2(y +4) = -2(x +3)
-2y -8 = -2x -6
-2y = -2x -6 +8
-2y = -2x +2
2x -2y -2 = 0