Answer:
The balance after 3 days would be, -$19.00
Explanation:
This is can shown by multiplying the ammount owed per day ($-5.5) times 3 and adding this to the current balance ($-2.5)
-5.5 x 3 = 16.5 and -16.5 + -2.5 = 19 so her balance would become -$19.00