Question

Anna does sit-ups to get ready for her first triathlon. When she starts, she does a sit-up every

2
22 seconds. But, as she gets tired, each sit-up takes longer and longer to do.
Is the number of sit-ups Anna does proportional to the time she spends doing them?

Answer 1

No

Explanation:

The fact that each sit-up is harder to complete as Anna grows fatigued suggests that there isn't a straight correlation between the number of sit-ups and the amount of time needed to complete them. There will likely be a nonlinear relationship between the number of sit-ups and the time it takes to complete them as Anna becomes more exhausted since the time it takes her to do each sit-up will likely grow at an increasing pace.

In general, two variables are only considered to be proportional when their changes are made in direct proportion to one another, or when their ratio does not change. However, in this instance, when the quantity of sit-ups increases, it takes longer to complete each one.