[tex]\bf ~~~~~~~~~~~~\textit{middle point of 2 points } \\\\ (\stackrel{x_1}{-5}~,~\stackrel{y_1}{-1})\qquad (\stackrel{x_2}{-2}~,~\stackrel{y_2}{-5}) \qquad \left(\cfrac{ x_2 + x_1}{2}~~~ ,~~~ \cfrac{ y_2 + y_1}{2} \right) \\\\\\ \left( \cfrac{-2-5}{2}~~,~~\cfrac{-5-1}{2} \right)\implies \left( \cfrac{-7}{2}~~,~~\cfrac{-6}{2} \right)\implies \left(-3\frac{1}{2}~~,~~-3 \right)[/tex]
