Answer :
[tex]\begin{gathered} x_1=0,y_1=5,x_2=8,y_2=-1 \\ parallel\text{ }slope\Rightarrow m=\frac{y_2-y_1}{x_2-x_1} \\ m=\frac{-1-5}{8-0} \\ m=-\frac{3}{4} \\ \text{perpendicular slope}\Rightarrow m=\frac{4}{3} \end{gathered}[/tex]