[tex]\bf (\stackrel{x_1}{19}~,~\stackrel{y_1}{-16})\qquad (\stackrel{x_2}{-7}~,~\stackrel{y_2}{-15}) \\\\\\ \stackrel{slope}{m}\implies \cfrac{\stackrel{rise} {\stackrel{y_2}{-15}-\stackrel{y1}{(-16)}}}{\underset{run} {\underset{x_2}{-7}-\underset{x_1}{19}}}\implies \cfrac{-15+16}{-26}\implies -\cfrac{1}{26}[/tex]
