Four Regression Datasets

[1] X-values for datasets 1, 2, and 3

[2] Y-values for dataset 1

[3] Y-values for dataset 2

[4] Y-values for dataset 3

[5] X-values for dataset 4

[6] Y-values for dataset 4

Source: F. J. Anscombe (1973), "Graphs in statistical analysis," 
American Statistician, 27: 17-21.