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y-y₁ y₂-y₁
___ = ____
x-x₁ x₂-x₁
y-(-3) 4-(-3)
____ = _____
x-6 0-6
y+3 4+3
___ = ___
x-6 -6
y+3 7
___ = ___
x-6 -6
7(x-6) = -6(y+3)
7x-42 = -6y-18
7x+6y = -18+42
7x+6y = 24