Chapter 11.3, Problem 16E

a.

To determine

To make a line graph using every $5^{\text{th}}$ year.

Explanation of Solution

Given information:

The table given below shows the number of visitors (in millions) to ski areas in the United states in $10$ different years:

  

Graph:

  

Interpretation:

The Graph shows that the number of people visiting the ski areas increased from 1980 to 1985 then it decreased in the next five years then it again increased gradually for the next 10 years.

b.

To determine

To make a line graph using all the years.

Explanation of Solution

Given information:

The table given below shows the number of visitors (in millions) to ski areas in the United states in $10$ different years:

  

Graph:

  

Interpretation:

From the above graph, it is seen that the number of people visiting the ski areas keeps on increasing and decreasing.

c.

To determine

To determine which one of the above graphs represents the data more accurately.

Explanation of Solution

Given information:

The graphs shown in part a and b:

  

Proof:

The graph shown in part b represents the data more accurately because, in some of the years the number of people increased which is not shown in part a. moreover, the graph b has more data readings so it gives a more accurate representation.