check the picture below.
so, the median is drawn from "c" and will land half-way in the segment "ab", thus is called a "median", what are those coordinates? well, is just the Midpoint of ab,
[tex]\bf ~~~~~~~~~~~~\textit{middle point of 2 points }\\\\
\begin{array}{ccccccccc}
&&x_1&&y_1&&x_2&&y_2\\
% (a,b)
&a&(~ 1 &,& 6~)
% (c,d)
&b&(~ 13 &,& 2~)
\end{array}\qquad
% coordinates of midpoint
\left(\cfrac{ x_2 + x_1}{2}\quad ,\quad \cfrac{ y_2 + y_1}{2} \right)
\\\\\\
\left( \cfrac{13+1}{2}~~,~~\cfrac{2+6}{2} \right)[/tex]
and surely you'd know what that is.
