The following data on the number of iron workers in the United States for the years 1978 ...

     The following data on the number of iron workers in the   United States for the years 1978 through 2008 are provided by the U.S. Bureau   of Labor Statistics. Using regression techniques discussed in this section,   analyze the data for trend. Develop a scatter plot of the data and fit the   trend line through the data. Discuss the strength of the model.       Year Members   1978 17340   1979 16996   1980 16975   1981 16913   1982 17002   1983 16960   1984 16740   1985 16568   1986 16390   1987 16598   1988 16748   1989 16360   1990 16269   1991 16110   1992 16211   1993 16477   1994 16334   1995 16305   1996 16145   1997 15776   1998 15472   1999 16685   2000 15359   2001 16670   2002 16098   2003 16212   2004 16316   2005 16718   2006 16707   2007 16113   2008 15128