According to Charles's Law, the pressure of a contained gas is directly proportional to its temperature. This means that if the temperature of a contained gas is lowered, its pressure will also decrease. This relationship can be mathematically expressed as follows:

P = k * T

-Where P represents the pressure of the gas

-T represents the temperature of the gas

-k represents a constant

As the temperature (T) decreases, the pressure (P) will also decrease proportionally, assuming the volume of the container remains constant.