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y = 7/3 -6/3x
y = 7/3 -2x
maka, m₁ = -2
m₁ . m₂ = -1
-2 . m₂ = -1
m₂ = -1/-2
m₂ = 1/2
y -y₁ = m(x -x₁)
y -(-2) = 1/2(x -4)
y +2 = 1/2x -4/2
y +2 = 1/2x -2 dikali 2 untuk mnghilangkan penyebut, sehingga
2y +4 = x -4
2y = x -4 -4
2y = x -8