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Line Graphs

Line graphs have the following characteristics:

  • there needs to be two axes representing the two variables of data
  • different scales may be used on the two axes
  • a number of data points are plotted on the graph, and a line drawn to join the data points
  • this line represents the relationship or pattern between the two variables represented in the horizontal and vertical axes
  • due to the available trend, future data points can be predicted by extending this trend line beyond the plotted points
  • also values between those plotted points can be determined using the trend line

Sometimes multiple columns and stacked columns can be used to compare several data sets together directly.

line graph