Pressure of Gas for Density and Temperature

Theorem
The pressure, density and temperature of a body of gas are linked by the equation:


 * $p = k \rho \paren {1 + \alpha t}$

where:
 * $p$ denotes the pressure of the gas
 * $\rho$ denotes the density of the gas
 * $t$ denotes thetemperature of the gas
 * $k$ and $\alpha$ are constants.