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.

Explore how conversion graphs are used to change one unit into another with BBC Bitesize Maths. For students between the ages of 11 and 14.

The minimum efficient scale (MES) ... During constant returns, the U-shaped curve remains flat (see earlier graph) until diseconomies of scale begin and costs rise without input.