Question

Coach Burns charted the change in his runners’ 5K times from the first race of the year to the second race of the year. Which student improved the most by decreasing the time needed to run the race?

Overall Change in 5K Times from the First to the Second Race
Runner
Time over (+) or under (–) previous run
Albert
–15.7 seconds
Cody
+1.4 seconds
Hannah
+4.5 seconds
Yasim
–37.4 seconds

Albert
Cody
Hannah
Yasim

Answer 1

Yasim improved the most according to Coach Burns' chart by decreasing his 5K time by 37.4 seconds from the first race to the second race.

Step-by-step explanation:

To determine which runner improved the most according to Coach Burns' chart, we look for the runner with the greatest decrease in their 5K time from the first race to the second race. The runner's time changes are represented as time over (+) or under (–) the previous run. A negative change indicates improvement because it means the runner has decreased their time (run faster), while a positive change indicates a slower time.

• Albert - –15.7 seconds
• Cody - +1.4 seconds
• Hannah - +4.5 seconds
• Yasim - –37.4 seconds

Among the runners, Yasim has the largest negative number, which means he improved the most by decreasing his time by 37.4 seconds.