6.5 Data Visualization

Data visualization turns numbers into pictures — bar charts, line graphs, scatter plots, and maps. A good chart reveals patterns, trends, and odd values that are invisible in a wall of numbers.

A line chart instantly reveals a trend that a long table hides.

Plotting monthly coffee export volumes as a line chart instantly shows the harvest-season peak — something hard to spot scanning a long table of raw figures.

Scenario

You want to compare total sales across five branches in one glance. Which chart is best?

Check your understanding

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Which chart best shows a trend over time?