Explanation
Step 1
if you have two points P1 and P2 , the midpoint is given by:
[tex]\begin{gathered} \text{midpoint}_{P1P2}=(\frac{x_1+x_2}{2},\frac{y_1+y_2}{2}) \\ \text{where} \\ P1(x_{_1,}y) \\ P2(x_2,y_2) \end{gathered}[/tex]Let
P1(3,-18)
P2(-5,-10)
Step 2
replace,
[tex]\begin{gathered} \text{midpoint}_{P1P2}=(\frac{x_1+x_2}{2},\frac{y_1+y_2}{2}) \\ \text{midpoint}_{P1P2}=(\frac{3-5}{2},\frac{-18-10}{2}) \\ \text{midpoint}_{P1P2}=(\frac{-2}{2},\frac{-28}{2}) \\ \text{midpoint}_{P1P2}=(-1,-14) \\ \end{gathered}[/tex]I hope this helps you
