Answer:
Amount of gas and Temperature
Explanation:
The graph shown depicts the relationship between amount of gas and temperature.
If we take the amount of gas to be volume, then this is a diagrammatic representation of the Charles's law.
Charles's law states that "the volume of a fixed mass of a gas varies directly as its absolute temperature if the pressure is constant".
The graph shown depicts a proportionality in which the higher the temperature, the more the volume of the gas occupied and vice versa.
