The absolute temperature of a gas is increased four times while maintaining a constant volume. What happens to the pressure of the gas?

The pressure increases by a factor of four

Explanation:

You can tell that temperature and pressure are directly proportional. How? Well if there is more temperature present, molecules tend to increase in kinetic energy, moving faster. Doing so the pressure increases,

Now volume also plays a role in this, the greater the volume the less the pressure as the molecules have more room to expand. Thus, they are inversely proportional. Here the volume is constant, so that makes everything simpler. As the temperature of the gas is increases 4 times, the pressure is also increased, by a factor of four.

Hope that helps!