Francisco purchased x hot dogs and y hamburgers at a baseball game. He spent a total of $10. The equation below describes the relationship between the number of hot dogs and the number of hamburgers purchased.

3x + 4y = 10

The ordered pair (2, 1) is a solution of the equation. What does the solution (2, 1) represent?
Select one:
Hot dogs cost $2 each and hamburgers cost $1 each.
Francisco spent $2 on hot dogs and $1 on hamburgers.
Francisco purchased 2 hot dogs and 1 hamburger.
Hamburgers cost 2 times as much as hot dogs.