what is the midpoint between the walt city and koshville ?

We have to use the midpoint formula.
[tex]\begin{gathered} M=(\frac{x_1+x_2}{2},\frac{y_1+y_2}{2}) \\ M=(\frac{-1+4}{2},\frac{-3+9}{2}) \\ M=(\frac{3}{2},\frac{6}{2}) \\ M=(\frac{3}{2},3) \end{gathered}[/tex]