Question

The graph shows the relationship between the numbers of cases of hamburgers and hot dogs ordered by a restaurant owner. Each ordered pair represents an order for a certain month. In the graph, x represents the number of hamburgers and y represents the number of hot dogs.

On a coordinate plane the x-axis represents the number of hamburgers and the y-axis represents the number of hot dogs. The points that make up this graph have the following coordinates: ten comma 5, twenty comma ten, thirty comma fifteen, and forty comma twenty.

Which sentence represents the function?

The number of h