A company has been gathering both the advertising costs
and the floor space dedicated towards generating the
sales received for each of its 12 stores

Store	Advertising	Floor Space	Sales
1	$ 2,500	2,100	$ 21,000
2	$ 1,100	4,000	$ 41,000
3	$ 1,700	2,900	$ 35,000
4	$ 1,000	4,100	$ 54,000
6	$ 2,200	3,200	$ 33,000
5	$ 2,500	2,300	$ 33,000
7	$ 2,800	2,100	$ 28,000
Based upon the above data, what will be the preferred activity
to predict sales - advertising or floor space? Display the calculation
used to make this determination and explain how this calculation
justifies your answer.