A bar graph is a chart used to represent data with rectangular bars. The length or height of each bar corresponds to the value it represents. Bar graphs help compare different categories of data and are commonly used to show trends or distributions in an easy-to-understand visual format.

In this chapter students learn how to collect organize and present data. They explore methods like tally marks tables and bar graphs to represent information. The chapter also focuses on interpreting the data and drawing conclusions. These skills are essential for understanding and communicating data clearly.