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# For the following exercises, identify whether the statement represents an exponential function. Explain.A population of bacteria decreases by a factor of $\frac{1}{8}$ every 24 hours.

## $\frac{1}{8}$

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so we want to be able to quickly identify. Function is an exponential function or not. If it increases or decreases by a percentage of the current value, it is exponential population change. Bacteria is a very typical example. Look for factor or proportion in question, so if it decreases by factor, her unit time, it is an exponential function.

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