Yes, the total price you pay is proportional to the number of tickets you buy.
The price per ticket remains constant at $10.50. You never buy popcorn, so it doesn't affect the total price.
Since the price per ticket is fixed and the only variable is the number of tickets (x), the total price (y) will be directly proportional to the number of tickets: y = mx, where m is the constant price per ticket ($10.50).
Therefore, as the number of tickets you buy increases, the total price will also increase proportionally.