Final answer:
The unit rate of the airplane's speed is determined by dividing the total distance by the total time, resulting in 350 miles per hour.
Step-by-step explanation:
The unit rate can be determined by writing an equivalent rate with a denominator of 1. In your case, the rate at which an airplane flew was 700 miles over 2 hours. To find the unit rate, divide the number of miles by the number of hours to find miles per hour.
The calculation would look like this: 700 miles / 2 hours = 350 miles / 1 hour, meaning the airplane flies at a rate of 350 miles per hour.