Boyle's Law states that:

* At a constant temperature, the volume of a given mass of gas is inversely proportional to its pressure.

This means that as the pressure of a gas increases, its volume decreases proportionally, and vice versa. Mathematically, this can be represented as:

P₁V₁ = P₂V₂

Where:

* P₁ = Initial pressure

* V₁ = Initial volume

* P₂ = Final pressure

* V₂ = Final volume