How to make a good graph


Title, your names, date

Data set types
          Do you have numerical values in different categories?

                  Use bar graph, with types or groups on horizontal
          Or are they pairs of continuous numbers?
                  Use line graph, connecting the dots left to right

Selecting axes
          Independent variable on horizontal (that you controlled)
                   IV “I vary”, conditions or elapsed time
          Dependent variable on vertical (that you measured)
                   DV “data”

Set up uniform numerical scales (use pencil)
          That can show largest and smallest values for each axis
          Data should fill at least half the space available
          Label each axis, including units

If showing means (averages), add error bars if possible

If 2 or more data sets, use different colors, label the lines

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