Roy C. Milton, An Extended Table of Critical Values for the Mann-Whitney (Wilcoxon) Two-Sample Statistic, Journal of the American Statistical Association, Vol. 59, No. 307 (Sep., 1964), pp. 925-934 ...

This journal, begun in 1943 as Mathematical Tables and Other Aids to Computation, publishes original articles on all aspects of numerical mathematics, book reviews, mathematical tables, and technical ...

Often a table of values is used to create the coordinates. We use substitution to calculate the values. For example y = 2x + 1 The y value is always '2 lots' of the x value plus 1.