Basic Guidelines For English Spellings
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1A diagram in which different variables are plotted along each axis and data is represented by dots, the position of each dot being determined by the values of those variables for the data point associated with it.
2A chart in which each quantity or frequency is indicated by the position of a single dot relative to the horizontal axis.
3A chart in which quantities or frequencies are represented by columns of equally spaced dots.
1950s.