Scuba diving. The pressure P on the body of a scuba diver increases linearly as she descends to greater depths d in sea–water. The pressure at a depth of 10 feet is 19.2 pounds per square inch, and the pressure at a depth of 25 feet is 25.95 pounds per square inch.
a. Write the equation relating P and d (with d as independent variable) in slope–intercept form.
b. What is the meaning of the slope and the y–intercept in part (a)?
c. Determine the pressure on a scuba diver who is at a depth of 160 feet.
d. Find the depth at which the pressure on the body of the scuba diver is 104.7 pounds per square inch.
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