Resposta:
[tex]\textsf{Leia abaixo}[/tex]
Explicação passo-a-passo:
[tex]\mathsf{m = \dfrac{\Delta_Y}{\Delta_X} = \dfrac{y_B - y_A}{x_B - x_A} = \dfrac{1 - 2}{-3 - 1} = \dfrac{-1}{-4} = \dfrac{1}{4}}[/tex]
[tex]\mathsf{y - y_0 = m(x - x_0)}[/tex]
[tex]\mathsf{y - 2 = \dfrac{1}{4}(x - 1)}[/tex]
[tex]\mathsf{4y - 8 = x - 1}[/tex]
[tex]\boxed{\boxed{\mathsf{y = \dfrac{x + 7}{4}}}}\leftarrow\textsf{equa{\c c}{\~a}o reduzida}[/tex]
[tex]\boxed{\boxed{\mathsf{x - 4y + 7 = 0}}}\leftarrow\textsf{equa{\c c}{\~a}o geral}[/tex]
