In 2009, US Airways Flight 1549 made a successful emergency landing in the Hudson River, after striking birds shortly after takeoff. Are bird strikes an increasing threat to planes?
(a) Make an Excel graph of the data on bird strikes.
(b) Discuss the underlying causes that might explain the trend.
(c) Use Excel, MegaStat, or MINITAB to t three trends (linear, quadratic, and exponential) to the time series.
(d) Which trend model do you think is best to make forecasts for the next 3 years? Why?
(e) Use each of the three fitted trend equations to make numerical forecasts for 2008, 2009, and 2010. How much difference does the choice of model make? Which forecasts do you trust the most, and why?

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Number of Reported Bird Strikes to Civil Aircraft in U.S., 1997-2007 BirdStrikes Year Strikes Year Strikes 1990 1991 1992 1993 1994 1995 1996 1997 1998 1,738 2,252 2,351 2,395 2,459 2,643 2,840 3,351 3,658 1999 2000 2001 2002 2003 2004 2005 2006 2007 5,002 5,872 5,644 6,044 5,854 6,398 7,036 6,996 7,439