Bar Graphs

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Bar Graphs
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Bar Graphs

• Bar graphs are used to show amounts of data.
• How much? How many?
• Example the number of students who have a
  birthday in each month.

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A bar graph has an x-axis and a y-axis.

• Y-axis (vertical) shows the scale
• X-axis shows the items being measured.

Y-axis (vertical)
X-axis (horizontal)
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A bar graph uses a scale to show the different
amounts.
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The interval of the scale is how far the numbers
are spaced apart (counting by ones, fives, tens).
The greater your range, the greater your interval
should be.
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Horizontal Bar Graph
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How to make a bar graph

• Step 1 Choose a scale. (This goes on vertical
  Y-axis)
• Step 2 Draw and label the side and bottom of the
  graph. (Items being graphed horizontal Y-Axis)
• Step 3 Draw a bar on the graph for each item in
  the data file.
• Step 4 Give the graph a title. The title should
  describe the subject of the graph.

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Step 1 Choose a Scale
18 15 12 9 6 3 0
Animal Heights Animal Heights
Asian Elephant 9 feet
African Elephant 11 feet
Lion 3 feet
Rhinoceros 6 feet






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Step 2 Label the side and bottom.
18 15 12 9 6 3 0
Animal Heights Animal Heights
Asian Elephant 9 feet
African Elephant 11 feet
Lion 3 feet
Rhinoceros 6 feet






Height in Feet
Rhinoceros
Asian Elephant
African Elephant
Lion
Animals
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Step 3 Draw a bar on the graph for each item in
the data file.
18 15 12 9 6 3 0
Animal Heights Animal Heights
Asian Elephant 9 feet
African Elephant 11 feet
Lion 3 feet
Rhinoceros 6 feet







Height in Feet
Rhinoceros
Asian Elephant
African Elephant
Lion
Animals
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Step 4 Give the graph a title. The title should
describe the subject of the graph.
Animal Heights
18 15 12 9 6 3 0
Animal Heights Animal Heights
Asian Elephant 9 feet
African Elephant 11 feet
Lion 3 feet
Rhinoceros 6 feet







Height in Feet
Rhinoceros
Asian Elephant
African Elephant
Lion
Animals
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Your turn!

• Here is data that shows how much of each type of
  candy was sold by a fourth grade class.
• Step 1 Choose a scale. (This goes on vertical
  Y-axis)
• Step 2 Draw and label the side and bottom of the
  graph. (Items being graphed horizontal Y-Axis)
• Step 3 Draw a bar on the graph for each item in
  the data file.
• Step 4 Give the graph a title. The title should
  describe the subject of the graph.

Type of Candy Number of Pieces Sold
Skittles 2
MMs 8
Snickers 3
Starburst 12
Reeses 5