A wireless industry survey estimates the number of cell-phone subscribers in the United States for 1998 - 2003 as follows. Year Cell-Phone Subscribers(in millions) 1998 69.2 1999 86.0 2000 109.5 2001 128.4 2002 140.8 2003 158.7 Find the scatter plot and the least squares line y = mx + b, where x is the year (x=1 for 1998, x =2 for 1999, etc.) and y is the number of subscribers