[tex]\bf ~~~~~~~~~~~~\textit{middle point of 2 points } \\\\ A(\stackrel{x_1}{-7}~,~\stackrel{y_1}{-9})\qquad B(\stackrel{x_2}{6}~,~\stackrel{y_2}{3}) \qquad \left(\cfrac{ x_2 + x_1}{2}~~~ ,~~~ \cfrac{ y_2 + y_1}{2} \right) \\\\\\ \left( \cfrac{6-7}{2}~~,~~\cfrac{3-9}{2} \right)\implies \left( \cfrac{-1}{2}~,~\cfrac{-6}{2} \right)\implies \left(-\frac{1}{2}~,~-3 \right)[/tex]
