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Interpreting scatter plots
Graphing-solutions-to-two-variable-linear-equations 256
Description
Exercise Name: Interpreting scatter plots
Math Missions: 8th grade (U.S.) Math Mission, High school statistics and probability Math Mission
Types of Problems: 5

The Interpreting scatter plots exercise appears under the 8th grade (U.S.) Math Mission and High school statistics and probability Math Mission. This exercise practices the ability to read and understand scatterplots.

Types of Problems

There are five types of problems in this exercise:

  1. Answer the question about the two scatterplots: This problem provides two scatterplots that may (or may not) have relationships pictured. The student is asked to select the best answer among a set of answer choices.
    Isp1

    Answer the question about the two scatterplots

  2. Select the categorization: This problem provides a pair of scatter plots and several possible classifications. The student is asked to select the most appropriate classification in each case.
    Isp2

    Select the categorization

  3. Determine the relationship: This problem provides a single scatterplot and asks the student to determine the relationship that is pictured.
    Isp3

    Determine the relationship

  4. Determine the graph that works: This problem describes a contextual situation and asks the student to select which of the four scatterplots describes the situation most closely.
    Isp4

    Determine the graph that works

  5. Find the outliers: This problem provides a scatterplot and asks the student to determine which of the labeled points could be considered outliers.
    Isp5

    Find the outliers

Strategies

General knowledge of scatterplots would be advantageous in this exercise, but is not necessarily required.

  1. A scatterplot is negative linear if it looks like a negative sloped line.
  2. A scatterplot is positive linear if it looks like a positive sloped line.
  3. A scatterplot is non-linear if it looks like a different shape (for example exponential, or like a parabola)
  4. A scatterplot shows no relationship if it is either random or points are essentially best fit with a straight horizontal (left and right line).

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.

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