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Two categories in a line graph use lines of the same colour and style. What should be improved?

Answer and explanation

Correct answer: The lines should use different colours or styles

The governing concept is visual differentiation and use of a clear legend. If two categories have identical line colour and style, the reader cannot reliably tell which points belong to which category, even when the values are correct. Giving the lines different colours, dash patterns, markers, or other accessible cues, and explaining them in a legend, improves interpretation. Therefore, option C is correct; removing values or the title reduces information.

Related tags

Line GraphLine StylesLegendData VisualizationVisual CommunicationCommunication Skills IArtificial IntelligenceClass 9 Mcq

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