How do you calculate population growth?
We calculate population growth by looking at the change in population over time.
We calculate population growth by looking at the change in population over time. The formula for population growth is below:
For example, if we have a population of zebras in 1990 that had 100 individuals, we know the population is growing at a rate of 5%, and we want to know what the population is in the year 2020, we would do the following to solve:
We multiply .05 by 30 years. Then we raise e by that result (1.5). Our last step is to then multiply 4.48 by our original population, which is 100 individuals.
Our answer is 448 individuals. So, from a population of 100 individuals in 1990, if that population is growing at a rate of 5%, we will have 448 individuals in the year 2020.