Think about the x-coordinate and the y-coordinate separately.
Starting with the x-coordinate:
- Find the difference between the two x-coordinates -2 and 8, which is 10.
- to find the mid-point, we need to half the difference, that gives us 5.
- and finally add it to our smaller x-coordinate value -2, giving us 3, which is the x-coordinate for C.//
Do the same with the y-coordinates:
- difference between 4 and 9 is 5.
2 half it gives 2.5.
- add it to the smaller y-coordinate value 4, giving us 6.5 which is the y-coordinate for C.//
Hence C has coordinates (3, 6.5)