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Line Graphs

In statistics, various types of graphs are used to represent data efficiently. This topic covers the creation and interpretation of line graphs and double line graphs

Topic: Make and Interpret a Line Graph

  • Data that shows change over time is best displayed in a line graph

  • The scale must include all of the data values. The interval separates the scale into equal parts

  • The scale and interval should be chosen such that all the data values can be clearly marked on the graph

  • Mark a point for the data set and connect the points

Topic: Make and Interpret a Double Line Graph

  • A double line graph is a method of displaying a set of data, often used to compare two sets of data and the changes in them over time

  • The scale must include all of the data values. The interval separates the scale into equal parts

  • The scale and interval should be chosen such that all the data values can be clearly marked on the graph

Topic: Use Line Graph to Find Range, Mode, Mean, and Median

  • Range is the difference between the maximum and the minimum values in the data set

  • The mode is the value or values that occur most often. A data set may or may not have a mode

  • The mean is the sum of all the values divided by the number of values in the set

  • The median of a dataset is the middle value (or mean of two middle values) when all the data is in numerical order

Topic: Use Double Line Graph to Find Range, Mode, Mean, and Median

  • Range is the difference between the maximum and the minimum values in the data set

  • The mode is the value or values that occur most often. Data set may or may not have a mode

  • The mean is the sum of all the values divided by the number of items in the set

  • The median of a dataset is the middle or central value when all the data is arranged in numerical order
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