In a bar chart, how do you identify the largest category?

• A. The tallest bar.
• B. The bar with the widest base.
• C. The bar with the lightest shading.
• D. The bar with the most labels.

Answer: (A)

In bar charts, the height of each bar corresponds to the value of its category. The largest category is shown by the tallest bar, since height encodes magnitude. The width of the bar’s base is usually constant, and shading or the number of labels don’t indicate value. So to identify the largest category, look for the tallest bar (or the longest bar if the chart is horizontal).