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y₂ - y₁
y - y₁ = ------------ (x -x₁)
x₂ - x₁
- 8 - 7
y - 7 = ----------- (x - 2)
2 - 2
y - 7 = -15 (x - 2)
y - 7 = -15x + 30
y = -15x + 30 + 7
y = -15x + 37
Pasamos a la forma general :
Ax + By + C = 0
y = -15x + 30
15x + y + 30 = 0
Respuesta :
15x + y + 30 = 0