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Maka, m (gradien) = 2
y -y₁ = m(x -x₁)
y -(-4) = 2(x -2)
y +4 = 2x -4
y = 2x -4 -4
y = 2x -8
2x -y -8 = 0
Jadi, persamaannya adalah 2x -y -8 = 0.
y' = f(x') = 2 → m= 2
y - y1 = m(x - x1)
y - (-4) = 2(x - 2)
y = 2x - 4 - 4
y = 2x -8
maaf ya kalo salah