In J-shaped form of population growth, the density increases in an exponential manner and then a crash occurs or the increase stops abruptly as environmental resistance becomes effective. This is mathematically described by an equation of exponential or geometric increase, which is as follows dtdN=rN where, d = rate of change t = time N = number of females at a particular time r = biotic potential of each female (N can also be considered as the total population and as the biotic potential of each individual).