What is the relationship between pressure and volume of a dry gas at constant temperature?

Question

Question Quiz BPL Hot Air - Balloon Pilot License - Principles of Flight (Balloon)

QuizVDS · Accepted Answer

The volume is inversely proportional to pressure

QuizVDS · Answer

The volume increases proportional with pressure

QuizVDS · Answer

The volume increases by a factor of 4 with double pressure

QuizVDS · Answer

The ration between pressure and volume is constant

Id 394 - BPL Hot Air - What is the relationship between pressure and volume of a dry gas at constant temperature?