How realistic are these charts? According to this chart i should

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Data analysis - Wikipedia

When you use a smoothed line chart, your data is not affected, it's misrepresented!

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16 Best Types of Charts and Graphs for Data Visualization [+ Guide]

Describing bar charts about reading habits

Data Visualization

Codd's Rules in DBMS

Fan chart with time scale - Ideas - The Gramps Project (Discourse Forum & Mailing List)

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