Before revision: Given two measurements of a growing quantity, q1 at time t1 and q2 at time t2, and assuming a constant growth rate, the doubling time can be calculated as Where it is useful Constant relative growth rate means simply that the increase per unit time is proportional to the current quantity, i.e.
After revision: Given two measurements of a growing quantity, q1 at time t1 and q2 at time t2, and assuming a constant growth rate, the doubling time can be calculated as Constant relative growth rate means simply that the increase per unit time is proportional to the current quantity, i.e.