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p₁(2 , - 2)
p₂(- 4 , 1)
Ecuación de la pendiente.
m = (y₂ - y₁)/(x₂ - x₁)
m = (1 - (- 2))/(-4 - 2)
m = (1 + 2)/(- 6)
m = - 3/6
m = - 1/2
m = -1/2
p₁(2 , -2)
Ecuación de la recta punto pendiente.
y - y₁ = m (x - x₁)
y - (- 2) = - 1/2(x - 2)
y + 2 = - 1/2(x - 2)
2(y + 2) = - 1(x - 2)
2y + 4 = - x + 2
x + 2y + 4 - 2 = 0
x + 2y + 2 = 0
Respuesta.
x + 2y + 2 = 0