The figure shows three straight lines, each with 31 points. In the first line the points are very tightly spaced at the left end, and very widely spaced at the right end. In the second line the points are very tightly spaced at the right, and very widely spaced at the left. In the third line the points are again tightly spaced at the left, and widely spaced at the right, but not as much so as in the first line.

Last updated 2 Apr 2003