# Question

(a) Plot U.S. petroleum imports on a graph.

(b) Describe the trend (if any) and discuss possible causes.

(c) Fit both a linear and an exponential trend.

(c) Interpret each fitted trend equation, explaining the implications.

(d) Make a projection for 2010. Do you believe it?

(e) To whom is this issue relevant? Note: Time increments are 5 years, so use t = 11 for the 2010 forecast.

(b) Describe the trend (if any) and discuss possible causes.

(c) Fit both a linear and an exponential trend.

(c) Interpret each fitted trend equation, explaining the implications.

(d) Make a projection for 2010. Do you believe it?

(e) To whom is this issue relevant? Note: Time increments are 5 years, so use t = 11 for the 2010 forecast.

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