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Searching for ## Bar, Line, and Circle Graphs

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Math Foundations

You will construct and analyze data from a contextual situation using bar graphs and line graphs.

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After completing this tutorial, you will be able to complete the following:

- Construct bar graphs and line graphs.
- Analyze data, including comparing trends, from a contextual situation using bar graphs and line graphs.
- Analyze the appropriateness of a graphical display that represents a contextual situation.

In this Activity Object, students will construct bar graphs and line graphs to analyze data from a real life scenario. Each graph will then be analyzed for its appropriateness for the situation.

There is no hard rule on when to use each type of graphical display, however some situations are better for each graph. Bar graphs represent the number of items in specific categories and are non-continuous, like surveys, inventories, etc. An instance that would be appropriate for using a bar graph might be graphing how many hours a day students spend on the computer. Line graphs show change over a period of time or other continuous scale. They are helpful in showing trends in data or for making predictions. One example of a situation that would be appropriate for a line graph would be plotting the time spent on studying (x-axis) and the grades earned (y-axis).

Examples from newspapers or other print can be used to introduce students to these types of graphs before starting the Activity Object.

The following key vocabulary terms will be used throughout this Activity Object:

bar graph - a graph that shows the relationship among data using bars to represent the number of items in specific categories

line graph - a graph that compares how two or more variables change over time

x-axis - the horizontal axis of a two-dimensional plot

y-axis -the vertical axis of a two-dimensional plot

Approximate Time | 22 Minutes |

Pre-requisite Concepts | Students should be familiar with bar graphs and line graphs. |

Course | Math Foundations |

Type of Tutorial | Concept Development |

Key Vocabulary | average sales, bar graphs, graphical display |