EXAMPLE 1 Making a Circle Graph

Email

A survey asked, “How often do you check your e-mail?” Of the 100 people asked, 4 responded less than weekly, 23 responded weekly, and 73 responded every day. Display the data in a circle graph.

STEP 1 Use a proportion to find the number of degrees you should use to represent each response as a section of a circle graph.

Less than weekly Weekly Every day

4100

a360°= 23

100a

360°= 73100

a360°=

a = 14.4° 14° ≈ b = 82.8° 83°≈ c = 262.8° 263°≈

EXAMPLE 1

STEP 2 Draw a circle. Show its center.

STEP 3 Use a protractor to draw the first angle measure. Labelthe section.

STEP 4 Draw and label remaining sections. Include a title.

The graph shows that most people check their e- mail every day.

Making a Circle Graph

EXAMPLE 2

Environment

The table shows the number of insect species on the United States endangered species list. Make a line graph of the data.

STEP 1 Draw and label the horizontaland vertical scales.

STEP 2 Plot a point for each data pair.

Making a Box-and-Whisker Plot

EXAMPLE 2 Making a Box-and-Whisker Plot

STEP 3 Draw line segments to connect the points. Include a title.

The graph shows an increase over time.

GUIDED PRACTICE for Example 1 and 2

Use the table of polling data.

1. Make a circle graph of the data for Week 1. What does the graph show?

More people would vote for Ben in week 1;

ANSWERWho Will You Vote For?

GUIDED PRACTICE for Example 1 and 2

2. Make a line graph of the data for Ben. What does the graph show?

The percent of people who would vote for Ben Decreased from week 1 to week 3;