A scatterplot uses Cartesian coordinates to display values for two variables from a given set of data. The data is then displayed as a collection of points which each having the value of a variable determining the position on the horizontal axis and the other variable determining the position on the vertical axis. The scatterplot above is showing the relationship between a wife's age and her husband's age.http://cnx.org/content/m10949/latest/age_scatterplot.gif
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