Question

What’s the perpendicular slope of -3/2

Answer 1

$\bf \stackrel{\textit{perpendicular lines have \underline{negative reciprocal} slopes}} {\stackrel{slope}{-\cfrac{3}{2}}\qquad \qquad \qquad \stackrel{reciprocal}{-\cfrac{2}{3}}\qquad \stackrel{negative~reciprocal}{+\cfrac{2}{3}\implies \cfrac{2}{3}}}$