Final answer:
The range of the function is {1, 2, 3, 4}.
Step-by-step explanation:
The range of a function is the set of all output values for a function. In this case, the function represents the number of vans needed to transport the members of the glee club based on the number of members.
To find the range, we look at the second value in each ordered pair. So, the range for this situation is {1, 2, 3, 4}.