The amounts spent in vending machines in the United States, in billions of dollars, for the years 19

Question: The amounts spent in vending machines in the United States, in billions of dollars, for the

years 1999 through 2003 are given below. Determine the least squares trend equation, and estimate vending sales for 2005.

Vending Machine Sales Year Code ($ billions) 1999 1 17.5 2000 2 19.0 2001 3 21.0 2002 4 22.7 2003 5 24.5