Question

Find the midpoint of the line segment with endpoints K(-4,4) and L(6,12)

Answer 1

The midpoint formula is (x1+x2/2),(y1+y2/2), so when you plug the coordinates in you get (1,8), so the answer is D.

Answer 2

Here's how I like to do this type of problem:  
                                                                                        -4+6
1.  Find the midpoint of K and L, parallel to the x axis:  --------- = 2/2 = 1 
                                                                                            2
                                               12+4
2.  ..... parallel to the y-axis:  -------- = 8
                                                  2

3.  Write the midpoint:  It is (1,8)