12. Which of the following situations represents a proportional relationship? A. A cheeseburger is $7.95 plus $1.00 for each additional topping.
B. A pool fills at a rate of 90 gallons per hour.
C. A health club charges a $40.00 membership fee plus $25.00 per month.
D. A bank account begins with $350.00 and gains $30.00 per month.