Respuesta :
[tex]\bf (\stackrel{x_1}{4}~,~\stackrel{y_1}{7})\qquad (\stackrel{x_2}{-1}~,~\stackrel{y_2}{-13}) ~\hfill \stackrel{slope}{m}\implies \cfrac{\stackrel{rise} {\stackrel{y_2}{-13}-\stackrel{y1}{7}}}{\underset{run} {\underset{x_2}{-1}-\underset{x_1}{4}}}\implies \cfrac{-20}{-5}\implies 4 \\\\\\ \begin{array}{|c|ll} \cline{1-1} \textit{point-slope form}\\ \cline{1-1} \\ y-y_1=m(x-x_1) \\\\ \cline{1-1} \end{array}\implies y-\stackrel{y_1}{7}=\stackrel{m}{4}(x-\stackrel{x_1}{4}) \\\\\\ y-7=4x-16\implies y = 4x-9[/tex]
