Answer:
The modal temperature last year is 11 (March and November)
Step-by-step explanation:
1. Let's review the information given to us to answer the question correctly:
A year ago Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
           9   10   11  14   19   22  27  29  21   18   11  6
2 years ago Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
           7   11   10  13   17   23  25  25   20  18  12  9
2. What was the modal temperature last year?
Let's recall the mode of a data set is the number that occurs most frequently in the set. The number that occurs the most in the average temperatures last year is 11 (March and November) and 2 years ago is 25 (July and August) Â Â Â Â Â Â Â Â Â