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.

I am assuming the black dots are kids and the blue dots are teens. It cant be a because if the kids’ domain is doing so well, it cant be a secret. It cant be b either because y never crosses with x. We never really see the cost of the tickets unless I am missing something. I think it’s D because they start out at at 100 and go up pretty high, while the teens start at zero and dont go up as much with every ticket sold.

So I think the answer is C.

Please correct me if I’m wrong.

Equation:
A = P(1 + rt)
How to do it:
First, converting R percent to r a decimal
r = R/100 = 2.5%/100 = 0.025 per year,
putting time into years for simplicity,
9 months ÷ 12 months/year = 0.75 years,
then, solving our equation
A = 600(1 + (0.025 × 0.75)) = ___
What is it?