Needle to make parents do the right thing

Viewed individually the two graphs in this story tell well the story of the increase in measles and whopping cough. Both use a scale which starts at zero. What may be confusing for the casual reader, however, is a glance at the two graphs side by side. It might appear visually, that there were more cases of whopping cough in 1995 than cases of measles in 1993. Of course, this is not so, but the scales employed on the two graphs are vastly different. Students might like to suggest ways of displaying the information which is not quite so misleading to the casual reader.

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