Suppose the sales of a particular brand of MP3 player satisf

Suppose the sales of a particular brand of MP3 player satisfy the relationship S = 200x + 3800, where S represents the number of sales in year x, with x = 0 corresponding to 2002. Find the number of sales in 2005.

Solution

Solution:

t x

2002 0

2003 1

2004 2

2005 3

so x=3 for 2005

we have regression equation for sales as

S=200x+3800

for x=3 we get

S=200(3)+3800=4400

S=4400

therefore sales in 2005 is 4400.