In the said law, the volume of a gas varies inversely with pressure. Boyle's law is one of the gas laws we have. According to this law, at a fixed amount of an ideal gas which is at constant temperature, the pressure and volume are inversely proportional with each other. The variables are volume and pressure.
Answer: Pressure and volumes are the variables in Boyle's law.
Explanation:
Boyle's law states " The pressure of gas is inversely proportional to the volume occupied by the gas when the temperature(in kelvins) is held constant ".
[tex]P\propto \frac{1}{V}[/tex]
[tex]PV=\text{constant}[/tex]
Which means that, with increase in the volume of gas the pressure exerted by the gas decreases or vice versa.
Here variables were pressure and volume.