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Different Graph Types: When and How to Use Them

Learn about different types of graphs such as line, scatterplot, bar, histogram, and pie chart, their specific uses, and when to use them to effectively display data patterns and relationships. Enhance your visualization skills and choose the right graph for your data representation needs.

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Different Graph Types: When and How to Use Them

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  1. Types of Graph And when to use them!

  2. Line Graph

  3. Line Graph • Used to show trends • Variable plotted on X (bottom) musts be continuous • Common type is “time series” where X = time • CANNOT be used to graph data where X is discrete

  4. Scatterplot

  5. Scatterplot • Used to show relationships between variables • X variable must be continuous • If one variable is believed to cause or explain changes in the other, that variable is plotted on the X

  6. Bar Graph

  7. Bar Graph • Used to compare amounts or frequencies in data that represents different categories (discrete data sets) • Categorical data set is plotted on X, quantitative (continuous) on the Y • Often used incorrectly to graph data with continuous X variables

  8. Histogram

  9. Histogram • Used when discrete X is converted to categories (“bins”) • Y represents frequency of data within each “bin”

  10. Pie Chart

  11. Pie Chart • Used for same kind of data as bar chart • Each slice = data category • Slice size shows relative proportion of observations within each category

  12. Summary: Types of Graph

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