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Marking data on line plots

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The first instance of Marking data on line plots is under the 3rd grade (U.S.) Math Mission. This exercise constructs line plots from given information.

Types of Problems

There are two types of problems in this exercise:

  1. Use the chart and make a line plot: This problem presents the student with a chart. Users are to take the information from the chart, answer a question, and make a line plot from the data.
    Lineplot1

    Use the chart and make a line plot

  2. Make line plot of lengths: This problem has a group of segments and an interactive ruler. Users are supposed to use the ruler to measure the segments and then creates a line plot based on those measurements.
    Lineplot2

    Make line plot of lengths

Strategies

An ability to use a measuring device or having a good sized monitor will help to increase ability to perform this exercise.

  1. On the first problem type the question is just how many dots will be needed. The answer to this will be the number of data points which is the number of rows in the chart.
  2. With the segments the user can place the transparent rule over all segments and measure them simultaneously. There is no need to align the lower left hand corners as they do with opaque rulers.

Real-life Applications

  1. Data and statistics appear in news reports and in the media every day.
  2. Many of the problems in this exercise could be viewed as real-life applications.
  3. Statistics can be seen more frequently than calculus in every day life.
  4. The standard unimodal, roughly symmetric data set is the normal model, and it has many applications in business and sciences (social and physical).

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