A scatterplot uses Cartesian coordinates to display values for two variables for a set of data. It is displayed as a set of points each one has a value of one variable determining the position on the horizontal, while the other variable determines position on the vertical axis. The scatterplot is used to draw correlations between variables in question.
The above image is a scatterplot that displays data for spousal ages, with the Husband's age on the x-axis (the run) and the Wife's age on the y-axis (the rise), and the correlations thereof.
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