What does absolute value do?

It changes negative numbers to positive.

Step-by-step explanation:

Absolute value is the measure of a numbers distance from 0. You can't have negative distance, so absolute value of negative numbers is positive and absolute value of positive numbers is always positive. The absolute values of 5 and - 5 are both 5 because they are both 5 units away from 0 on a number line, just in opposite directions.