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y = -3/4x + 5/4
m₁ = -3/4 (gradien merupakan koefisien dari persamaan y = mx + c)
m₁ × m₂ = -1
-3/4 × m₂ = -1
m₂ = 4/3
(y - y₁) = m(x - x₁)
(y - 2) = 4/3(x - (-1))
y - 2 = 4/3(x + 1)
y - 2 = 4/3x + 4/3
3y - 6 = 4x + 4
3y = 4x + 4 + 6
3y = 4x + 10