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y - y1 = x - x1
y2 - y1 x2 - x1
y - 0 = x + 3
-6 - 0 0 + 3
y = x + 3 kali silang
- 6 3
3y = -6x - 18
y = -2x - 6
Jadi, persamaan garis/grafiknya adalah f(x) = -2x - 6 (jawaban D)
x₁ = -3 x₂ = 0
(y-y₁)/(y₂-y₁) = (x-x₁)/(x₂-x₁)
(y-0)/(-6-0) = (x+3)/(0+3) *pindah ruas
3 . y = -6 (x+3)
y = -2 (x+3)
y = -2x-6
:)