A scatterplot is a summary of bivariate data that consists of individual points plotted on the graph. The points show the relationship between 2 variables, and form a pattern that indicates the strength of the relationship. Scatterplots can be used to plot a trend line and determine the association between the two variables. In this scatterplot, husbands' and wives' ages are plotted, resulting in a positive association and a strong relationship since the points are all pretty close to one another.
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