Chapter 6.1, Problem 30E

To determine

The information that can be obtained from the area of the region.

Answer to Problem 30E

The area of region gives the no of unit sold in 10 year.

Explanation of Solution

Given information:

The graph shows the sales record for a company over a 10-year period.

  

Formula used:

  $\left(\begin{array}{l}\text{unit of area}\\ \text{under curve}\end{array}\right)=\text{millions}$

Calculation:

The vertical axis gives the sale and horizontal axis gives the information about duration.

So, unit of sale is millions/year and unit of time is year. Then

  $\begin{array}{l}\left(\begin{array}{l}\text{unit of area}\\ \text{under curve}\end{array}\right)=\frac{\text{millions}}{\text{year}}\times \text{year}\\ \left(\begin{array}{l}\text{unit of area}\\ \text{under curve}\end{array}\right)=\text{millions}\end{array}$

So, area of region gives the no of unit sold in 10 year.

Conclusion:

The area of region gives the no of unit sold in 10 year.