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U.S. Usage of Renewable Energy (quad BTU), 2011-2018 Year Usage Year Usage U.S. Usage of Renewable Energy (quad BTU), 2011-2018 Year Usage Year Usage 2011

U.S. Usage of Renewable Energy (quad BTU), 2011-2018 Year Usage Year Usage

U.S. Usage of Renewable Energy (quad BTU), 2011-2018
Year Usage Year Usage
2011 9.2 2015 9.72
2012 8.85 2016 10.37
2013 9.45 2017 11.18
2014 9.74 2018 11.52

a) Make an Excel graph of the data on usage of renewable energy in the United States

b)Discuss the underlying causes that might explain the trend or pattern

c)Fit three trends (linear, quadratic, exponential) to the time series

d)Use each of the three fitted trend equations to make numerical forecasts for the next three years. How similar are the three models' forecasts?

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