Solved: Modeling Data The table shows the net sales (in billions of dollars), the total
Chapter 13, Problem 84(choose chapter or problem)
Modeling Data The table shows the net sales x (in billions of dollars), the total assets y (in billions of dollars), and the shareholder’s equity z (in billions of dollars) for Wal-Mart for the years 2002 through 2007. (Source: 2007 Annual Report for Wal-Mart)
A model for these data is
z=f(x, y)=0.026x + 0.316y + 5.04
(a) Use a graphing utility and the model to approximate z for the given values of x and y
(b) Which of the two variables in this model has the greater influence on shareholder’s equity?
(c) Simplify the expression for f(x, 95) and interpret its meaning in the context of the problem.
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