Displaying Data

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4-5
Displaying Data
Warm Up
Problem of the Day
Lesson Presentation
Course 3
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Warm Up Write each fraction as a decimal. 1.
2. 3. 4.
2 5
49 50
0.04
0.98
7 10
3 50
0.06
0.7
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Problem of the Day Your job at the local library
is to shelve the returned books. To correctly
put the books on the shelves, you need to arrange
them in order according to their numbers. Which
order is correct?
C
A. 342.3, 342.5, 342.48, 342.52
B. 342.21, 342.47, 342.4, 342.59
C. 342.1, 342.17, 342.56, 342.76
D. 342.34, 342.43, 342.567, 342.56
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Learn to display data in bar graphs, histograms,
and line graphs.
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Insert Lesson Title Here
Vocabulary
bar graph frequency table histogram line graph
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A bar graph is a good way to display data that
can be grouped in categories. If the data is
given in the form of a list, it may help to
organize the data in a frequency table first
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Additional Example 1 Displaying Data in a Bar
Graph
Organize the data into a frequency table and make
a bar graph.
The following data set reflects the number of
hours of television watched every day by members
of a sixth-grade class
1 1 3 0 2 0 5 3 1 3
First, organize the data into a frequency table.
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Additional Example 1 Continued
Organize the data into a frequency table and make
a bar graph.
1 1 3 0 2 0 5 3 1 3
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Additional Example 1 Continued
Organize the data into a frequency table and make
a bar graph.
1 1 3 0 2 0 5 3 1 3
The frequency is the number of times each value
occurs.
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Additional Example 1 Continued
Organize the data into a frequency table and make
a bar graph.
The frequencies are the heights of the bars in
the bar graph.
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Try This Example 1
Organize the data into a frequency table and make
a bar graph.
The following data set reflects the number of
laptop computers that are repaired by Mike the
technician in one week. (each number is one day)
3 5 7 8 4
First, organize the data into a frequency table.
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Try This Example 1 Continued
Organize the data into a frequency table and make
a bar graph.
3 5 7 8 4
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Try This Example 1 Continued
Organize the data into a frequency table and make
a bar graph.
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Additional Example 2 Displaying Data in a
Histogram
Jimmy surveyed 12 children to find out how much
money they received from the tooth fairy. Use the
data to make a histogram.
0.35 2.00 0.75 2.50 1.50 3.00 0.25 1.00 1.00 3.50
0.50 3.00
First, make a frequency table with intervals of
1.00. Then make a histogram.
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Additional Example 2 Continued
0.35 2.00 0.75 2.50 1.50 3.00 0.25 1.00 1.00 3.50
0.50 3.00
Frequency
Money ()
4
0 0.99
3
1.00 1.99
2
2.00 2.99
3
3.00 3.99
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Additional Example 2 Continued
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Try This Example 2
Tonya surveyed 14 children at an after school day
care to find out how many hours they spend there.
Use the data to make a Histogram.
200 140 300 030 100 130 230 030 245 100
200 135 130 300
First, make a frequency table with intervals of
30 minutes. Then make a histogram.
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Try This Example 2 Continued
200 140 300 030 100 130 230 030 245 100
200 135 130 300
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Try This Example 2 Continued
Frequency
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Additional Example 3 Displaying Data in a Line
Graph
Make a line graph of the given data. Use the
graph to estimate Mr. Yis salary in 1992.
Salary ()
Year
42,000
1985
49,000
1990
58,000
1995
69,000
2000
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Additional Example 3 Continued
Create ordered pairs from the data in the table
and plot them on a grid. Connect the points with
lines. You can estimate the salary in 1992 by
finding the point on the line between 1990 and
1995 that corresponds to 1992.
Mr. Yis Salary
Mr. Yis 1992 salary was about 51,000.
Salary
Year
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Try This Example 3
Make a line graph of the given data. Use the
graph to estimate the number of drivers licenses
issued in 1993.
200 190 180 170 160 150 140
80 85 90 95 00
About 172 million
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Insert Lesson Title Here
Lesson Quiz Part 1
1. Organize the data in a frequency table and
make a bar graph.
2, 4, 3, 1, 4, 1, 2, 2, 5, 1, 4, 3, 2, 1, 4, 3,
5, 2
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Insert Lesson Title Here
Lesson Quiz Part 2
Use the graph for problems 24.
2. What day did Sue exercise for 30 minutes?
Friday
3. How long did Sue exercise on Tuesday?
20 minutes
4. How many days did Sue exercise that week?
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