A chart for plotting relations between variables over their entire real range

L. H. Donnell
1943 Quarterly of Applied Mathematics  
The following simple method of graphical respresentation, covering the entire real range, seems rather obvious and the writer has found it useful for many years; however he has never seen it described in the literature. It consists of an ordinary Carm n -/ o r r • w y<o y<Or -/ w ■ 6<
doi:10.1090/qam/9163 fatcat:wl5nzneyafg65bdrfsxqofy6xa