B.3. Fill in the table by finding the unknown in the given problem involving direct variation. Write your answers in your notebook. Problem Mathematical Solutions Equation 1. The volume (V) of a gas a. Given: varies directly as the pressure b. Find k. (P). What is the volume of a c. Equation of the Variation: gas under a pressure of 72 d. Unknown: pounds when the gas occupies e. Answer: 32 cubic centimeters under a pressure of 78 pounds?