Which of the intervals represents the gap in the data

Giuseppi's pizza had orders for $931.00 of pizzas. the prices were $21 for a large pizza, 514 for a medium pizza, and $7 for a small pizza. the number of large pizzas was two less than four times the number of medium pizzas. thenumber of small pizzas was three more than three times the number of medium pizzas. how many of each size of pizza were ordered?

The graph represents the gallons of water in a water tank with respect to the number of hours since it was completely filled

Haley buys 9 pounds of apples for $3. how many pounds of apples can she buy for $1?