All Greens Franchise

The data (X1, X2, X3, X4, X5, X6) are for each franchise store.
X1 = annual net sales/$1000
X2 = number sq. ft./1000
X3 = inventory/$1000
X4 = amount spent on advertizing/$1000
X5 = size of sales district/1000 families
X6 = number of competing stores in district