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The logistic function is a function with domain and range the open interval, defined as: Equivalently, it can be written as: Yet another form that is sometimes used, because it makes some aspects of the symmetry more evident, is: For this page, we will denote the function by the letter.We may extend the logistic function to a function, where and.et another form that is sometimes used, because it makes some aspects of the symmetry more evident, is: For this page, we will denote the function by the letter. We may extend the logistic function to a function, where and.
Introduction to functions and models: LOGISTIC GROWTH MODELS 1. Introduction (easy)The growth of organisms in a favourable environment is typically modeled by a simple exponential function, in which the population size increases at an ever-increasing rate.hat the model looks like (simple)A plot of the logistic growth curve looks like this:Notice that the population starts with one individual, and eventually reaches an equilibrium value, in this case about 2000 individuals (the value of K set for this example).