**The formula for exponential population growth is (a) dt/dN = rN (b)dN/rN = dt (c) rN/dN = dt (d) dN/dt = rN**

###### Answers:

J-shaped form of population growth is mathematically described by an equation of exponential or geometric increase, which is as follows :

dN/dt = 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 r as the biotic potential of each individual).