What type of data is easily represented by a bar graph

Bar charts are one of the many techniques used to present data in a visual form so that the reader may readily recognize patterns or trends. Bar charts usually present categorical variables, discrete variables or continuous variables grouped in class intervals.

Bar graphs are used to compare things between different groups or to track changes over time. However, when trying to measure change over time, bar graphs are best when the changes are larger. . . . an Area Graph.