Question

what is the opposite of the rational number -2

Answer 1

The 'opposite' of a number is usually the opposite sign, but same absolute value. 

-2 → Opposite is 2

Answer would be: 2

Answer 2

the answer is 2.
the opposite of any number, is it's positive number, so there for the opposite of the rational number -2, is 2.

(hope this helps)