Which practice helps ensure charts convey the intended message clearly?

• A. Rely primarily on legends to describe data
• B. Use tiny fonts to fit more data
• C. Label important data directly on the chart rather than relying on a legend
• D. Hide axis titles to minimize clutter

Answer: (C)

Direct labeling of data on the chart makes the message clear at a glance. When you put labels directly on bars, lines, or data points, the viewer immediately knows what each element represents and its value or category without having to search a separate legend. This reduces the mental effort required to interpret the chart, helps prevent misreadings, and improves accessibility across devices and for people with color-vision differences.

Relying on a legend can lead to confusion if the legend is overlooked, misplaced, or hard to match to chart elements, which slows comprehension. Using tiny fonts makes labels hard to read, defeating the purpose of clarity. Hiding axis titles removes essential context like units and scales, making it harder to interpret what the chart is actually showing. In short, direct labels on the data themselves keep the chart self-contained and easy to understand.