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2y +2 = -7/4x +49/4 dikali 4 untuk menghilangkan penyebut, sehingga
8y +8 = -7x +49
8y = -7x +49 -8
8y = -7x +41
y = -7/8 x +41/8
m₁ = -7/8
m₁ . m₂ = -1
-7/8 . m₂ = -1
m₂ = -1 per -7/8
m₂ = 8/7
y -y₁ = m(x -x₁)
y -(-3) = 8/7(x -(-2))
y +3 = 8/7 x +16/7 dikali 7 untuk menghilangkan penyebut, jadi
7y +21 = 8x +16
7y = 8x +16 -21
7y = 8x -5