Write the equation representing the relation between resistivity and temperature.

(N/A) The resistivity $\rho$ of a metallic conductor at a temperature $T$ is related to its resistivity $\rho_0$ at a reference temperature $T_0$ by the following linear equation:
$\rho_T = \rho_0 [1 + \alpha(T - T_0)]$
Where:
- $\rho_T$ is the resistivity at temperature $T$.
- $\rho_0$ is the resistivity at reference temperature $T_0$.
- $\alpha$ is the temperature coefficient of resistivity.
- $(T - T_0)$ is the change in temperature.