Boyle's Law states that the absolute pressure and volume of a gas are inversely proportional, when the temperature and the amount of gas are held constant. In other words, if you increase the pressure of a gas, its volume will decrease proportionally, and vice versa.
Here's what the variables represent:
* P₁: Initial pressure of the gas
* V₁: Initial volume of the gas
* P₂: Final pressure of the gas
* V₂: Final volume of the gas
Note: This simplified equation assumes that the temperature and the amount of gas remain constant.