#### Answer

$\left(\dfrac{3}{2},-6\right)$

#### Work Step by Step

The midpoint of the two points $(x_1,y_1)$ and $(x_2,y_2)$ is the point $\left(\dfrac{x_1+x_2}{2},\dfrac{y_1+y_2}{2}\right)$
$\left(\dfrac{-3+6}{2},\dfrac{-4-8}{2}\right) = \left(\dfrac{3}{2},-6\right)$