Final answer:
To convert 549 words in 9 minutes into a unit rate, divide the total number of words by the total number of minutes. The unit rate is 61 words per minute.
Step-by-step explanation:
To convert the given value of 549 words in 9 minutes into a unit rate, we need to divide the total number of words by the total number of minutes. The unit rate will be the number of words per minute. So, the unit rate for 549 words in 9 minutes is 61 words per minute.