Pure exponential growth
Pure exponential growth begins slowly, then literally explodes over time.
Bacteria population tends to grow exponentially in a suitable environment.
Different growth rates result in different levels of growth at a particular point of time, but growth is still ultimately explosive (see below).
Efficiency-Discounted Exponential Growth
Efficiency-Discounted Exponential Growth (EDEG) involved the consumption of a non-replenished resource over time by a system of reproducing agents.
Logistic Growth
In logistic growth, population tends to move towards a particular population level that reflects the carrying capacity of the system or environment.