Describing Bar Charts and Column Charts (3)

Observe the following charts:

These two charts show EXACTLY the same information. However, it is easier to see the differences in the first chart because the Y axis starts at 30, not zero. Sometimes charts are formatted like this in order to make the differences more obvious.

However, you must be careful when describing a particular chart. If the Y axis does not start from zero differences can seem greater than they actually are. So you must look at the actual numbers when making comparisons.