(a) Plot the data on revolving credit (credit cards and home equity lines of credit are the two major types of revolving credit).
(b) Use MegaStat or MINITAB to calculate seasonal indexes and trend. Is there a trend in the deseasonalized data?
(c) Which months have the most borrowing? The least? Is this logical?
(d) Discuss anything unusual in the shape of the trend that might make forecasting dif cult.

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U.S. Consumers Revolving Credit (billions) Month 2005 2006 2007 2008 2009 2010 816 804 794 803 802 808 808 816 819 820 833 857 844 834 826 832 840 840 843 853 856 859 876 900 885 876 873 879 889 896 902 916 920 930 947 973 962 953 947 952 954 960 966 974 973 969 975 989 969 943 923 917 910 905 904 902 893 887 884 894 868 845 828 820 819 817 816 816 807 803 808 827 Feb Mar Apr May Jul Aug Sep Nov Dec