Chapter 13.1, Problem 82E

(a)

To determine

To calculate: The approximate value of the equity of shareholder in billions of dollars $\left(z\right)$ for the provided values of the net sales in billions of dollars $\left(x\right)$ and the total assets in billions of dollars $\left(y\right)$ using the model $z=f\left(x,y\right)=0.035x+0.640y-1.77$ and the graphing utility.

(b)

To determine

Which of the two variable $\left(x\right)$ and $\left(y\right)$ in the model $z=f\left(x,y\right)=0.035x+0.640y-1.77$, where $\left(z\right)$ is the equity of shareholder in billions of dollars, $\left(x\right)$ is the net sales in billions of dollars and $\left(y\right)$ is the total assets in billions of dollars, has greater influence on the equity of shareholder.

(c)

To determine

The simplified expression for $f\left(x,150\right)$ for the model $z=0.035x+0.640y-1.77$, where $\left(z\right)$ is the equity of shareholder in billions of dollars, $\left(x\right)$ is the net sales in billions of dollars and $\left(y\right)$ is the total assets in billions of dollars and interpret its meaning in context of the problem.