Revenue Model Use the price model above to construct a revenue model. Find a model for the weekly revenue, using as the independent variable. NOTE: Do not calculate another regression. Use the price equation to find a model for revenue R(x)=p. x. R(x) px (a + bx + cx²)x = ax + bx² + cx³ = Use this revenue model to answer questions 3-8 below.

Life Expectancy The average life expectancy in the United States has been rising steadily over the past few decades, as shown in the table. (a) Make a scatter plot of the data. (b) Find and graph the regression line. (c) Use the linear model you found in part (b) to predict the life expectancy in the year 2006. (d) Search the Internet or your campus library to find the actual 2006 average life expectancy. Compare to your answer in part (c).