2.10 Generating Electricity In 2012 in the United States, most electricity was generated from coal (37%), natural gas (30%), or nuclear power plants (19%). Hydropower accounted for 7% of the total electricity produced; other renewable sources such as wind or solar power accounted for 5%. Other nonrenewable sources (such as petroleum)

made up the remaining 2%. (Source: http://www.eia.gov/

electricity/annual/html/epa_01_01.html)

a. Display this information in a bar graph.

b. Which is easier to sketch relatively accurately, a pie chart or a bar chart?

c. What is the advantage of using a graph to summarize the results instead of merely stating the percentages for each source?

d. What is the modal category?