Budget Year Period ($ billions) 1988 3.03 1989 3.29 1990 3.56 1661 4.41 1992 5 4.36 1993 4.51 1994 4.65 1995 5.15 1996 5.34 1997 10 5 .66 1998 11 6.01 1999 12 6.20 2000 13 6.48 2001 14 6.75 2002 15 6.56 2003 16 6.88 2004 17 6.98 2005 18 7.65 2006 19 8.38 2007 20 8.67 2008 21 8.66 2009 22 8.53 2010 23 8.23 2011 24 8.86 (a) Construct a time series plot. 10 T Budget ($ billions) Budget ($ billions) Budget ($ billions) Budget ($ billions) 10 15 20 10 15 20 25 5 10 15 20 25 O Period 5 10 15 20 25 Period Period eriod what type of pattern exists in the data? The time series plot show orizontal pattern. The time serie The time ear trend. The time s plot shows a linear trend. b) Develop a linear trend equation for this time series to forecast the budget (In billions of dollars). (Round your numerical values to three decimal places.) T - (c) What is the forecast (In billions of dollars) for period 257 (Round your answer to two decimal places.) billion Submit