Question

As a diver descends into the ocean, the pressure increases linearly with the depth (i.e. pressure is a linear function of depth). At the surface (a depth of 0 feet) the pressure is 15 pounds per square inch. At a depth of 33 feet below the surface the pressure is 30 pounds per square inch.
A) Find a formula for the linear function that expresses pressure, P, in terms of depth, d.
Write your answer in slope-intercept form and round values to 2 decimal places, if necessary.
B) Use the function from part A to determine the pressure when the diver is 21 feet below the surface.
Round your answer to 2 decimal places, if necessary.
C) Use the function from part A to determine how deep can the diver go if the highest safe for his equipment and experience is 69 pounds per square inch.
Round your answer to 2 decimal places, if necessary.

Answer

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