The equation N_t = N₀ e^rt describes the exponential or geometrical growth of a population. In this equation, ‘r’ represents 

The equation  ${\mathrm{N}}_{\mathrm{t}}={\mathrm{N}}_0{\mathrm{e}}^{\mathrm{rt}}$ describes the exponential or geometrical growth of a population. In this equation, ‘r’ represents intrinsic rate of natural increase.