Final answer:
The requested altitude on a FAA flight plan indicates the initial cruising altitude for the route of flight, rather than the lowest or highest altitudes that might be encountered.
Step-by-step explanation:
The requested altitude on a FAA flight plan form represents the initial cruising altitude that the aircraft will fly once it is in en route phase of the flight. This altitude might be adjusted during the flight for various reasons like traffic, weather conditions, or at the pilot's request for efficiency or comfort.
However, it is important to note that the requested altitude is not necessarily the lowest or highest altitude that will be flown during the entire route, but it is rather the altitude the flight intends to reach after takeoff and initial climb.