The following secondary data have been obtained from the Park Trading Company’s audited annual accounts: LO9 Year Income (£) Expenditure (£)

1997 11 000 000 9 500 000 1998 15 200 000 12 900 000 1999 17 050 000 14 000 000 2000 17 900 000 14 900 000 2001 19 000 000 16 100 000 2002 18 700 000 17 200 000 2003 17 100 000 18 100 000 2004 17 700 000 19 500 000 2005 19 900 000 20 000 000 a Which are the variables and which are the cases?

b Sketch a possible data matrix for these data for entering into a spreadsheet.