Answer: | -15 | + | -6 | = 21 steps
Explanation:
The correct expression that represents the distance between Joy and Shaunte is:
| -15 | + | -6 | = 21 steps
This accounts for Joy walking 15 steps forward (| -15 |) and Shaunte walking 6 steps backward (| -6 |), resulting in a total distance of 21 steps.