Answer
The midpoint of the line segment $~\overline{P_1P_2}~$ is: $(-3, 2, 7)$
Work Step by Step
$P_1 = (0,0,0)$
$P_2 = (-6,4,14)$
We can find the midpoint between these two points:
$(\frac{x_1+x_2}{2},\frac{y_1+y_2}{2} ,\frac{z_1+z_2}{2})$
$= (\frac{0+(-6)}{2},\frac{0+4}{2} ,\frac{0+14}{2})$
$ = (-3, 2, 7)$
The midpoint of the line segment $~\overline{P_1P_2}~$ is: $(-3, 2, 7)$