3. Which of the following represents a proportional function?
A. The cost of renting a car from a company that chargers a flat fee of $50 plus $25 for every day the car is rented.
B. The balance of Kenya’s savings account that started with $500 and has her adding $50 every week to the account.
C. The total amount of money in Camila’s bank account after opening a new account with no money and depositing $200 every week into the account.
D. The amount a dog walker earns who chargers a fee of $10 for picking up a dog and $15.00 for every