Module 6: Line Graphs

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Module 6 Line Graphs
This module provides information on arithmetic
scale and semi-logarithmic or ratio scale line
graphs.
Reviewed 15 April 05 /MODULE 6
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Source Am J Public Health, Dec.2003 932101
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• Use Show amount of change or difference in the
  dependent variable (vertical axis) for the
  different points of the independent variable
  (horizontal axis).
• For Interval or ratio data.

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• Use Show rate of change in the dependent
  variable (vertical axis) for the different points
  of the independent variable (horizontal axis).
• For Interval or ratio data.

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Arithmetic and Semi-log Scale Line Graphs
Year A B C
1 10 60 12
2 20 70 24
3 30 80 48
4 40 90 96
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Semi-logarithmic Scale
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Ratio Scale
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A Line Graph and a Bar Chart with a Scale break