The correct sentence is:
The average speed for each lap decreases. This is an example of a(n) inverse relationship.
Explanation:
The distance traveled in each lap is constant: d = 400 m, however the time t increases at every lap. The average speed of the runner at each lap is given by
[tex]v=\frac{d}{t}[/tex]
Since d is constant while t increases, then the speed v must decrease. This is an example of inverse relationship: when the time t increases, the speed v decreases, and vice-versa.
