The Un-Named Law
This law, which is not credited to anyone in particular, says that as the amount of gas in a fixed container increases the pressure increases proportionally. In English, it says that more gas in a container makes more pressure.
This can be stated mathematically:
Why are the amount and pressure of a gas directly related? The answer is very straight forward. As the number of particles present increases they will bump into the walls more often, applying a greater force on the walls, resulting in a higher pressure.