Sales income: The following table shows the net monthly income N for a real estate agency as a function of the monthly real estate sales s, both measured in dollars. a. Make a table showing, for each...

Sales income: The following table shows the net monthly income N for a real estate agency as a function of the monthly real estate sales s, both measured in dollars.

a. Make a table showing, for each of the intervals in the table above, the average rate of change in N. What pattern do you see?

b. Use the average rate of change to estimate the net monthly income for monthly real estate sales of $520,000. In light of your answer to part a, how confident are you that your estimate is an accurate representation of the actual income?

c. Would you expect N to have a limiting value? Be sure to explain your reasoning.