Gradien = m = -4
Melalui titik (1, -2) → x₁ = 1 dan y₁ = -2
Rumus persamaan garis lurus:
y - y₁ = m(x - x₁)
y - (-2) = -4(x - 1)
y + 2 = -4x + 4
4x + y + 2 - 4 = 0
4x + y - 2 = 0
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Gradien = m = -4
Melalui titik (1, -2) → x₁ = 1 dan y₁ = -2
Rumus persamaan garis lurus:
y - y₁ = m(x - x₁)
y - (-2) = -4(x - 1)
y + 2 = -4x + 4
4x + y + 2 - 4 = 0
4x + y - 2 = 0