Answer
See explanation.
Work Step by Step
Equation 18.14 shows that the absolute temperature is proportional to the average translational kinetic energy for an ideal monatomic gas.
The ideal gas law, PV=nRT, shows us that if P is increased while the number of moles n stays the same (and presumably the volume V stays the same), the absolute temperature T rises. This increases the average translational kinetic energy of a gas atom.
It IS possible to change both P and V while leaving the average translational kinetic energy unaffected, as long as the temperature stays the same.
