Carmela is a member of a social club. She pays an annual membership fee and $15 for each event she attends. The equation y = 15x + 25 represents her total cost
each year. Which statement about the function is true? Select all that apply.
A: The initial value is 15.
B: X represents the cost of each event.
C: The rate of change is 15.
D: The initial value represents the annual membership fee.
E: The number of events she attends is a function of the total cost.
F: The total cost is a function of the number of events she attends.