Resposta:
[tex]\textsf{Leia abaixo}}[/tex]
Explicação passo-a-passo:
[tex]\mathsf{2x - y - 1 = 0}[/tex]
[tex]\mathsf{y = 2x - 1}[/tex]
[tex]\mathsf{m.m_0 = -1}[/tex]
[tex]\mathsf{m.2 = -1}[/tex]
[tex]\mathsf{m = -\dfrac{1}{2}}[/tex]
[tex]\mathsf{y - y_0 = m(x - x_0)}[/tex]
[tex]\mathsf{y - 4 = -\dfrac{1}{2}(x - (-1))}[/tex]
[tex]\mathsf{2y - 8 = -x - 1}[/tex]
[tex]\mathsf{2y = -x + 7}[/tex]
[tex]\boxed{\boxed{\mathsf{y = -\dfrac{x}{2} + \dfrac{7}{2}}}}\leftarrow\textsf{equa{\c c}{\~a}o reduzida}[/tex]
[tex]\mathsf{y = ax + b}[/tex]
[tex]\boxed{\boxed{\mathsf{b = \dfrac{7}{2}}}}\leftarrow\textsf{coeficiente linear}[/tex]
