State Gay-Lussac's Law.

(N/A) Gay-Lussac's Law states that for a given mass of an ideal gas, the pressure $(P)$ of the gas is directly proportional to its absolute temperature $(T)$, provided the volume $(V)$ remains constant.
Mathematically, this is expressed as:
$P \propto T$ (at constant $V$ and mass)
$P = kT$ or $\frac{P}{T} = \text{constant}$
where $P$ is the pressure, $T$ is the absolute temperature in Kelvin, and $k$ is a proportionality constant.