Answer:
-2.5 and 2.5 compare to eachother on the number line because they are the exact same distance away from 0.
Explanation:
0 is in the very middle and to get -2.5 you go to the left 2.5 paces but to get to +2.5 you go to the right 2.5 paces. Either way you have to move Exactly 2.5 paces either to the left or right depending on if you want a positive or negative.