This is not unlike a bar graph or a line graph. The big difference is that dots on a dot plot are not connected via a bar or a line. Bar and line graphs connect the dots with a solid bar or a line.

Want more charts like these? See our charts on the secrets of the jobless recovery, the richest 1 percent of Americans, and how the superwealthy beat the IRS. How Rich Are the Superrich? A huge sh ...