# CCSS IP Math I 4.2.3 Example 2

Lindsay created the table below showing the population of fruit flies over the last 10 weeks.
She estimates that the population of fruit flies can be represented by the equation .
Using residuals, determine if her representation is a good estimate.

- Find the estimated population at each
*x*-value. - Evaluate the equation at each value of
*x*. - Find the residuals by finding each difference between the observed population and estimated population.
- Create a residual plot.
- Analyze the residual plot to determine if the equation is a good estimate for the population.