To create an exponential function representing a population of 50 insects that is growing at a rate of 7%, we can use the formula:
\[ f(x) = P_0 \times (1 + r)^x \]
where:
- \( P_0 \) is the initial population (50 insects in this case),
- \( r \) is the growth rate (7% or 0.07),
- \( x \) is the time in appropriate units (e.g., days, months).
Plugging in the values:
\[ f(x) = 50 \times (1 + 0.07)^x \] \[ f(x) = 50 \times (1.07)^x \]
Thus, the correct function from your options is:
\[ f(x) = 50(1.07)^x \]
So the accurate response is:
f(x)=50(1.07)^x