There's a formula for finding the midpoint of a line segment.

The midpoint between two points, and is given by:

that is, the x-coordinate for the midpoint is the average of the x-coordinates of the two points and the y-coordinate of the midpoint is the average of the y-coordinates of the two points. it makes sense when you think about it. if you average two numbers, you get the number that is midway between them.

now try using that formula and tell us what you get