What is the midpoint of np if n (1,9) and p (-5-1)

(-5+1)/2= -4/2= -2

(9+(-1))/2= 8/2= 4

The first one, i believe, would be correct. all the others have one thing in common, and that's that they have repeating numbers. in the second one, x and y have repeating 6's and 3's, and in the third, x and y have repeating 6's as well. in the last one, there are repeating 3's. the first one has no repeating numbers.