To create an exponential function for a population of 50 insects growing at a rate of 7%, we start with the initial population and apply the growth rate.
- The initial population is 50.
- The growth rate is 7%, which means the growth factor is \(1 + 0.07 = 1.07\).
Thus, the function that represents the growth of the population over time \(x\) (where \(x\) is in the same time units as the growth rate) is:
\[ f(x) = 50(1.07)^x \]
Among the options provided, the correct function is:
f(x) = 50(1.07)^x.
This option accurately reflects the initial population and the exponential growth rate.