# Least squares equation

3. Listed below are the net sales for Schering-Plough Corporation (a pharmaceutical company) and its subsidiaries for the six years from 1997 to 2002. The net sales are in millions of dollars.

1997 $6714

1998 $7991

1999 $9075

2000 $9775

2001 $9762

2002 $10,180

Determine the least squares equation. According to this information, what are the estimated sales for 2005?

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$2.19