Final answer:
The correct button to use to seat a walk-in guest at a table in the dining room is the Walk-in button. This button is specifically meant for guests who arrive without a reservation, as opposed to other buttons which serve different functions such as managing reservations or guest information.
Step-by-step explanation:
To seat a walk-in guest at a table in the dining room, the appropriate button to use would typically be the Walk-in button. This button is designed for spontaneously arrived guests without prior reservations. The Reservation button is for guests who have made advance bookings, while the Seating button might be used in a more general context for managing seating preferences and assignments. Finally, the Guest button might be used for various guest-related operations, such as tracking guest information or preferences, but not specifically for seating a walk-in guest.
The context in which students might be using the campus restaurant can also give us clues about the button functionality. If there are concerns about the availability of seating due to students eating or studying, or both, the system used to manage seating might need to take into account the current seating capacity and availability. However, without more specific information about the software or system in use, we could assume that the 'Walk-in' feature is most likely intended to quickly accommodate guests without reservations.