Alexandra is scuba diving. A diving computer automatically records her depth every five minutes. The depth readings from her first 20 minutes of diving are shown in the table below.

Elapsed time (in minutes)
Depth (in meters)
0
0
5
–12.45
10
–9.7
15
–22.98
20
–6.6

Which best represents the greatest amount of change in her depth over a single 5-minute period?