Sketch a graph to show the relationship between the pressure of a gas and its absolute temperature.

A mass of gas is at $40°\mathrm{C}$ and a pressure of $200 \mathrm{kPa}$. It occupies a volume of $100 {\mathrm{cm}}^3$. The gas is compressed slowly, so that the temperature does not change. Calculate the new volume when the pressure is $500 \mathrm{kPa}$.