What rate is the pressure increasing?

Question

At a 33-foot depth underwater, the pressure is 29.55 pounds per square inch (psi). Are a depth of 66 feet, the pressure reaches 44.4 psi. At what rate is the pressure increasing?

Answer 1

During the time when depth went from 33 ft to 66 ft (a change of 33 ft), pressure increased from 29.55 psi to 44.40 psi, a net change of 14.85 psi.

 

The rate of change (average) then is 14.85 psi per 33 ft; I let you do the necessary division.