Step 1:

The water pressure at the surface of the ocean is ,

Let is the water pressure and is the depth of the water level.

The relation between pressure and depth are linearly related.

Where is the slope.

At surface of the ocean, the depth is zero and Pressure is

The water pressure is .

Step 2:

(a)

The water pressure increases by for every .

Slope .

Substitute  value in .

The water pressure as a function of depth is .

Step 3:

(b)

Water pressure .

Substitute in the Pressure function .

The depth of water is .

Solution :

(a) The water pressure as a function of depth is .

 (b) The depth of water at pressure is .