sarah has sold $33 worth of tickets sales to the comedy show. She has 4 tickets left to sell at $11 per hour

The equation would be y=11x+33.

The x can be 0, 1, 2, 3, 4. It cannot be any other number than these 5.
Y is just whatever you get when you plug the x in for 0, 1, 2, 3, or 4