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This vertical bar chart has 4 columns of varying height. The horizontal axis has no label and just shows each column labelled with a, b, c and d from left to right. The vertical axis is not labelled and has no units, but the scale goes from 0 to 300 in divisions of 50. The heights of the columns cannot be read accurately but are at approximately the following heights on the vertical axis:

  • a 235
  • b 255
  • c 270
  • d 240

The overall impression is of quite small variation in bar heights.

 3.2 Cheating with bar charts