# How do you fnd the slope of a line perpendicular to the graph of each equation y= x/-5 - 7?

If you have a line with slope equal to $m$ the perpendicular will have slope ${m}_{1} = - \frac{1}{m}$;
Your line has slope $m = - \frac{1}{5}$ (the coefficient of $x$) so the perpendicular will be:
${m}_{1} = - \frac{1}{- \frac{1}{5}} = 5$