Find the Midpoint (-9,-8) and (-1,2)

$(- 9, - 8)$ and $(- 1, 2)$

Use the midpoint formula to find the midpoint of the line segment.

$(\frac{x_{1} + x_{2}}{2}, \frac{y_{1} + y_{2}}{2})$

Substitute in the values for $(x_{1}, y_{1})$ and $(x_{2}, y_{2})$ .

$(\frac{- 9 - 1}{2}, \frac{- 8 + 2}{2})$

Subtract $1$ from $- 9$ .

$(\frac{- 10}{2}, \frac{- 8 + 2}{2})$

Divide $- 10$ by $2$ .

$(- 5, \frac{- 8 + 2}{2})$

Cancel the common factor of $- 8 + 2$ and $2$ .

Factor $2$ out of $- 8$ .

$(- 5, \frac{2 \cdot - 4 + 2}{2})$

Factor $2$ out of $2$ .

$(- 5, \frac{2 \cdot - 4 + 2 \cdot 1}{2})$

Factor $2$ out of $2 \cdot - 4 + 2 \cdot 1$ .

$(- 5, \frac{2 \cdot (- 4 + 1)}{2})$

Cancel the common factors.

Factor $2$ out of $2$ .

$(- 5, \frac{2 \cdot (- 4 + 1)}{2 (1)})$

Cancel the common factor.

$(- 5, \frac{2 \cdot (- 4 + 1)}{2 \cdot 1})$

Rewrite the expression.

$(- 5, \frac{- 4 + 1}{1})$

Divide $- 4 + 1$ by $1$ .

$(- 5, - 4 + 1)$

Add $- 4$ and $1$ .

$(- 5, - 3)$