Manco went scuba diving. As he dove deeper, the water pressure around him increased at a constant rate.

The table compares Manco's depth (in meters) and the water pressure around him (in atmospheres).

Depth (meters) Pressure (atmospheres)
13131313 2.32.32.32, point, 3
17171717 2.72.72.72, point, 7
21212121 3.13.13.13, point, 1

What is the rate of change of the water pressure?




atmospheres per meter