Finding generation time on a graph
Finding generation time should be pretty intuitive. Basically, you look for the amount of time it took the population to double. On the graph below, you can move the green bubble until you find the spot where the population has doubled (using the y axis). Then read the doubling time off the x-axis.
By definition, if a population is in exponential growth, it always takes the same amount of time to double. So, it doesn't matter where you start, as long as the population doubles, you'll have found the generation time. Try it below:
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