According to the Kinetic Theory of Gases, the average kinetic energy ($E$) of a gas molecule is directly proportional to its absolute temperature ($T$). The relationship is given by the equation $E = \frac{3}{2} k_B T$, where $k_B$ is the Boltzmann constant . Since $k_B$ is a constant, the average kinetic energy depends solely on the temperature of the gas and does not depend on pressure, volume, or the nature of the gas.