(1 pt) At the surface of the ocean, the water pressure is the same as the air pressure above the water, about 15lb/in2, Below the surface the water pressure increases by about 4.24lb/in2 for every 10 ft of descent.

Question

Write a function f(x) which expresses the water pressure in pounds per square inch as a function of the depth in inches below the ocean surface.

Answer 1

f(x) = 15 + 4.24(x/120)