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The table shows the biodiesel productions y (in thousands of barrels per day) for the United States for 2007 through 2012. The variable t represents the time in years, with t = 7 corresponding to 2007. (a) Plot the data by hand and connect adjacent points with a line segment. Use the slope of each line segment to determine the year when biodiesel production increased most rapidly. (b) Find the average rate of change of biodiesel production for the United States from 2007 through 2012. (c) Should the average rate of change be used to predict future biodiesel production? Explain.
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