Kaila runs competitively. She would like to calculate her average running speed each time she runs. Which data should Kaila record in order to calculate her average running speed?

Start and end times; distance run.

Step-by-step explanation:

Average speed = distance/time.

Kaila should record the distance run, the time she started, and the time she ended her run.

The difference between the start and end times gives the time for the run.

If she inserts her numbers into the formula, she will get her average running speed.