Graph (see next page for graph paper grid)
Using the data from the Coal Production Table, create a graph of coal usage in each region over
the years. The x-exis should be years, and the y-axis should be coal production. Use a different
symbol or color to represent each region. Remember to include titles and labels.
Scan or take a picture of your graph and submit it with your assignment
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Analysis
Changes over time are called trends. You can see on the graph a downward trend in the
Appalachian and Interior regions and an upward trend in the Western region.
Try predicting future coal production. Using a ruler, draw the lines for each region. Go beyond
2011. Draw the line with the same pattern it follows on the graph. The extension of the lines is
based on what you predict will happen with coal production.
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Questions
1. How much coal will be produced in the year 2020 for each region?

2. What trend would you predict for the next ten years for each region?
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3. If people keep using coal in the same way, scientists say there may be enough coal reserves
to last 200 to 300 years. Does your graph show trends that match what scientists say? What
kinds of factors might cause them not to match?
4. Can you think of any problems that could come from using only 15 years of data to predict
trends for the next 100 years? Explain your answer. How could you prevent some of these
problems?