![]() This tool is especially useful when projecting areas experiencing slow growth. When best to use: Use when the pattern of growth is similar to a straight line. It also assumes that growth will follow a similar pattern in future years. The linear model, when plotted on a graph, takes the form of a straight line as shown in Figure 6-2.Īssumption: The linear model assumes that population growth is growing at absolute equal increments per year, decade, or other unit of time. Three extrapolation tools will be introduced: the linear, exponential, and the modified exponential models. The discussion of extrapolation tools presented in the following section relies on three classic references: Krueckeberg and Silvers (1974) Pittenger (1976) and Croxton, Cowden, and Klein (1967).
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