Bar Graphs and Line Graphs

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# Bar Graphs and Line Graphs - PowerPoint PPT Presentation

Bar Graphs and Line Graphs. #30. VOCABULARY. A bar graph can be used to display and compare data. A bar graph displays data with vertical or horizontal bars. Additional Example 1: Reading a Bar Graph Use the bar graph to answer each question.

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Presentation Transcript

VOCABULARY

A bar graph can be used to display and compare data. A bar graph displays data with vertical or horizontal bars.

Additional Example 1: Reading a Bar Graph

Use the bar graph to answer each question.

Which biome in the graph has the least average summer temperature?

Example 2: Reading a Bar Graph

Use the bar graph to answer each question.

Which biomes in the graph have an average summer temperature of 30 C or greater?

Example 3: Making a Bar Graph

Use the given data to make a bar graph.

Step 1: Find an appropriate scale and interval. The scale must include all of the data values. The interval separates the scale into equal parts.

Step 2: Use the data to determine the lengths of the bars. Draw bars of equal width. The bars cannot touch.

Step 3: Title the graph and label the axes.

Tickets Sold

215

285

310

Example 4

Use the data to make a bar graph.

VOCABULARY

A double-bar graph shows two sets of related data.

Club Memberships

Club

Art

Music

Science

Boys

12

6

16

Girls

8

14

10

Example 5: Problem Solving Application

Make a double-bar graph to compare the data in the table.

Club Memberships

Club

Band

Chess

Year Book

Boys

9

14

16

Girls

11

7

15

Example 6

Make a double-bar graph to compare the data in the table.

VOCABUALRY

Data that shows change over time is best displayed in a line graph. A line graph displays a set of data using line segments.

Population of New Hampshire

Year

Population

1650

1,300

1670

1,800

1690

4,200

1700

5,000

Example 7: Making a Line Graph

Use the data in the table to make a line graph.

Example 8: Reading a Line Graph

Use the line graph to answer each question.

A. In which year did CDs cost the most?

B. About how much did CDs cost in 2000?

C. Did CD prices increase or decrease from 1999 through 2002?

Example 9

Use the line graph to answer each question.

A. In which year did CDs cost the least?

B. About how much did CDs cost in 1999?

C. Did CD prices increase or decrease from 2001 to 2002?

VOCABULARY

Line graphs that display two sets of data are called double-line graphs.

Stock Prices

1985

1990

1995

2000

Corporation A

\$16

\$20

\$34

\$33

Corporation B

\$38

\$35

\$31

\$21

Use different colors of lines to connect the stock values so you will easily be able to tell the data apart.

Example 10: Making a Double-Line Graph

Use the data in the table to make a double-line graph.