Final answer:
The finish line in Jonas's system is represented by 0 meters as it is the neutral point dividing negative and positive numbers, which denote points before and after the finish line, respectively.
Step-by-step explanation:
Jonas is using a system where negative numbers represent points before the finish line and positive numbers represent points after the finish line.
Therefore, the point of reference where the race ends, or the finish line, would be represented by the number 0.
This is because 0 is neither negative nor positive and would serve as the neutral dividing point between locations before and after the finish line.
In this context, the location at -91 meters is the bridge, which is before the finish line, and the location at 14 meters is the restaurant, which is after the finish line.
Hence, the finish line in Jonas's system is represented by 0 meters as it is the neutral point dividing negative and positive numbers, which denote points before and after the finish line, respectively.