Which of the following situations represents a proportional relationship Y = K(X) a . A cheeseburger is $7.95 plus $1.00 for each additional topping.

b . A pool drains 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