The teens and kids groups at a club each sold tickets to raise money for a foundation. The graph below represents the situation. If kids are represented in black and teens in purple, which is true?

a. The domain for the kids is discrete.
b. The y-intercept for the teens club represents the amount of money raised before selling any tickets.
c. The cost for a kids ticket is $25.
d. The cost for a kids ticket is more than the cost for a teens ticket.
d. The domain for the juniors is a continuous function.