Respuesta :

y - y₁ = m(x - x₁)       slope(m) = 3     point (1, 4)

y - 4 = 3(x - 1)

y - 4 = 3x - 3

y = 3x - 3 + 4

3x - y = -1  <<< your answer

hope this helps, God bless!
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