Activity Description Enter data to create a double bar graph, then manipulate the graph's maximum and minimum values.

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Multi Bar Graph

Place in mathematics curriculum:

This activity can be used to:

• Demonstrate the idea of a multiple bar graph
  
• Create multiple bar graphs
  
• Give students practice in reading multiple bar graphs
  
• Display the purpose of visual representations of data
  

This activity allows the user to graph data on a multi bar graph. Students can use predefined data sets or enter their own data. Users can also change graph properties such as the scale and the color of the bars. This activity would work well in small groups of 3-4 for about 25-30 minutes if you use the exploration questions and 15-20 minutes otherwise.

Preparations for this activity:

• Encourage students to enter in their own data or be ready to give them examples of data to enter
  
• Explain how the scale can influence how the graph looks
  
• Discuss how graphs can be misleading
  
• Discuss the difference between categorical and quantitative data