Answer:
10 km in 97 seconds, 8 km in 83 seconds, 18 km in 198 seconds, 15 km in 168 seconds.
Explanation:
The unit rate for each session can be found by dividing the kilometers by the seconds. Then, make an equivalent fraction by dividing both the numerator and denominator by the numerator. This will show how many seconds it took to finish 1 kilometer during that session.