Bar graphs are used to show sets of data in more ... Using this axis requires the height of the bars showing odd numbers to be exactly between the even numbers along the vertical axis.

“Imagine a pie chart that shows Visuals at 42 percent, Numbers at 36 percent, Stupid Jokes at 15 percent and Random Complaints at 7 percent. Now let’s convert that to a bar chart.” ...

The labelling of the horizontal axis depends on what is being represented by the bar chart. Take care to ensure an appropriate scale, to number the axes uniformly, and give the appropriate label ...