Final answer:
The independent variable in this situation is the number of tickets, and the dependent variable is the total cost.
Step-by-step explanation:
In this situation, the independent variable is the number of tickets, while the dependent variable is the total cost.
The independent variable is the one that can be chosen or controlled, in this case, the number of tickets being purchased. The dependent variable is the one that is affected by the independent variable, in this case, the total cost which increases as the number of tickets increases.
For example, if you buy 1 ticket, the total cost will be $7. If you buy 2 tickets, the total cost will be $14. As you can see, the total cost increases as the number of tickets increases.