Answer: To check if the rates form a proportion, we need to calculate the rate (sit-ups per minute) for both Eric and John.
Eric's rate: 70 sit-ups / 2 minutes = 35 sit-ups per minute
John's rate: 108 sit-ups / 3 minutes = 36 sit-ups per minute
Now we can set up the proportion:
35/1 = 36/1
The rates do not form a proportion since they are not equal.
Explanation: