Hi there! So you have -3 and -1 as the x coordinates. Just forget about the negatives and make them positive. The answer will be the same. So 3-1 because difference means subtract. 2. 2 is the x coordinate. Same with the y coordinate. Drop the negative. 2-2=0. So your y coordinate is 0. So the final answer is (2,0). Let me know if you still don't understand :)
