The representation of numbers in graphs should be proportional to the numbers themselves. Otherwise, they mislead or deceive. Examples of misleading graphs not drawn to scale and a figure with ...

Click the first option under "Line" and click "OK." The second side scale is added and the Series2 data is converted into a line graph, ...

You should always look at the scale on a time graph. The scale may go up in ones or count in steps. It might not show every number. For example, on this graph, the vertical axis goes up in steps ...

Graphs that are not drawn to scale mislead the reader. This post shows another example of a graph where the visual representation of the numbers is not proportional to the numbers themselves.