Section 1.10 46 & 48 46. For a constant temperature, the pressure P of a gas is inversely proportional to the volume V of the gas. Solution: P = k/V 48. The gravitational attraction F between two objects of masses m_1 and m_2 is jointly proportional to the masses and inversely proportional to the square of the distance r between the objects. Let me see. F = k[(m_1•m_2)]/(r^2) You say?