Answer :

AL2006
The x-coordinate of the midpoint is the average of the x-coordinates
of the ends.
The average of the ends is  1/2(-3+0) = -1.5 .

The y-coordinate of the midpoint is the average of the y-coordinates
of the ends.
The average of the ends is  1/2(-4+2) = -1

The midpoint of the segment is  (-1.5, -1).