Problem

Box-Office Revenues The data in the table below give the box-office revenues, in billions...

Box-Office Revenues The data in the table below give the box-office revenues, in billions of dollars, for movies released in selected years between 1980 and 2009.

Year	Revenue (billions of $)	Year	Revenue (billions of $)
1980	2.75	2000	7.47
1985	3.75	2005	8.83
1990	5.02	2009	10.54
1995	5.27

a. Find the power model that best fits the revenues as a function of the number of years after 1970. Round to four decimal places.
b. What does the unrounded model estimate as the revenue in 2015?
c. Discuss the reliability of this estimation.