It seems like you're discussing a relationship between tickets sold and revenue generated. Let's fill in the blanks:
a. Every ticket sold is $X earned.
b. Dollars/1 ticket is called a revenue per ticket.
c. This relationship is linear, because 0 tickets sold is $0 dollars earned.
If "X" is a specific dollar amount for each ticket, you can replace it with that value. Let me know if you need any further assistance!