What does Boyle's Law state about the volume and pressure of a gas at constant temperature?

Boyle's Law states that at a constant temperature, the volume of a gas is inversely proportional to its pressure. This means that as the pressure of a gas increases, its volume decreases, and vice versa, provided the temperature remains unchanged. The relationship can be mathematically expressed as P1V1 = P2V2, where P represents pressure and V represents volume at two different states of the gas. This principle is key in understanding how gases behave under varying pressure conditions, reflecting the fact that a fixed amount of gas occupies more space (has greater volume) when the pressure exerted on it is reduced.

In contrast, the other options suggest direct relationships or constant values that do not align with the established behavior described by Boyle's Law. Thus, the correct statement captures the essential inverse relationship central to gas behavior at a constant temperature.