Multiple choice question

The equation y = 15x + 225 represents the relationship between the total cost, in dollars, y, to rent a banquet hall of a party, and the number of people attending, x. Which of the following statements are TRUE about the equation? Select All that apply.

A. The y-intercept is 15.
B. It is a linear function.
C. It has a slope of 15.
D. It has an initial value of 225.
E. It has a slope of 225.