A bar chart is a simple and effective way to represent data. The title shows you what you are ... The horizontal line is called the x-axis. The vertical line going up is the y-axis.

Then, you can customize them by changing colors and layout or adding chart elements like axis titles. Let's look at an example of a bar chart showing the usage of various browsers over the years.

Image caption, To construct a bar chart first identify the largest frequency. The largest frequency is 12. The vertical axis must go up to at least 12. The horizontal axis requires four categories.