Boyle's Law states that for a fixed amount of an ideal gas kept at a constant temperature, the absolute pressure and volume are inversely proportional. This means that if the pressure increases, the volume decreases proportionally, and vice versa. Mathematically, this is expressed as:

P₁V₁ = P₂V₂

Where:

* P₁ is the initial pressure

* V₁ is the initial volume

* P₂ is the final pressure

* V₂ is the final volume