Answer:
neither
Step-by-step explanation:
The number of laps John has run is 3 + the number of laps David has run. That is, both numbers are not zero at the same time, so the relationship cannot be proportional.
The numbers have a constant difference, not a constant product, so they are not inversely proportional, either.
David's laps and John's laps are neither proportional nor inversely proportional.