Answer:
The unit rate of 297 words for 5.5 minutes is, 54 words per minutes.
Explanation:
Unit rate defined as when rates are expressed as a quantity of 1, such as 5 feet per second or 6 miles per hour, then they are called unit rates
Given: 297 words for 5.5 minutes.
The ratio of words per minutes is:

By dividing the numerator and denominator by 5.5.
i.e

Therefore, unit rate is 54 words per minutes.