Question

Dada o coeficiente angular mr=2 e o ponto A(2;5) determine a reta r:
a) 2x-y=0
b) 4x-2y+3=0
c) 2x+y+3=0
d) 2x-y+1=0

Answer 1

Oie, tudo bom?

Resposta: d) 2x - y + 1 = 0.

P₀(x₀ , y₀) = A(2 , 5) mr = 2

P(x , y)

y - y₀ = m(x - x₀)

y - 5 = 2(x - 2)

y - 5 = 2x - 4

- 2x + y - 5 + 4 = 0

- 2x + y - 1 = 0 multiplique tudo por - 1.

2x - y + 1 = 0

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