Question: The Energy Information Administration of the U.S. Department of Energy provided time series data for the U.S. average price per gallon of conventional regular gasoline between January 2008 and May 20 1 1 (Energy Information Administration website. May 2010). Use the Internet to obtain the average price per gallon of conventional regular gasoline since May 2011.
a. Extend the graph of the time series shown in Figtre.
b. What interpretations can you make about the average price per gallon of conventional regular gasoline since May 2011?
c. Does the time series continue to show a summer increase in the average price per gallon? Explain.
