Answer: Boyle's law.
Step-by-step explanation:
Boyle's Law: This law states that pressure is inversely proportional to the volume of the gas at constant temperature and number of moles.
(At constant temperature and number of moles)
where,
= initial pressure of gas
= final pressure of gas
= initial volume of gas
= final volume of gas
Therefore, the law which states the volume of a gas is inversely proportional to the absolute pressure applied to it when the temperature is kept constant is Boyle's law.