The mid point of DE is (3,-1)
This can be found with Pythagorean Theorem
The length of “a” is 6. The length of “b” is 4.
The length of DE is ≈ 7.21. The midpoint of this value is found at coordinates (3,-1)
You must perform some cancellations to arrive at the final answer. I hope this helps
You can use a table like this x -1 0 1 2
y 0 2 4 6
and a T table