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Line Graphs are used to show how two parameters are related to each other. Or to put it another how one variable changes as another
changes. A Line graph consists of two axis, a vertical or Y axis and a horizontal or X axis.
The most common use of a line graph is to show how a piece of data varies over time. The X-axis generally represents time whilst
the Y-axis represents the value. Point are then plotted for each time interval and the points joined by a line. This provides
a visual representation of how the data varied over time.
Of course the x-axis does not have to represent time and in fact can represent anything required. The only requirement is that
there is some relationship between the X and Y axis.
The following line graph shows sales figures for a product by month. The line instantly conveys how sales vary throughout the
year.
The line graph is also very useful as a comparison tool. By plotting multiple series of data on the same grid it becomes very
easy to compare the data sets. The following graph shows points scored by three teams over a ten year period.
A variation on the line graph is the Ribbon Graph. This is basically a 3D version of the line graph.
Summary
Line graphs can be used to display a wide variety of data and relationships. In addition to great visual representation of data
they also highlight trends in the data. The human eye is particularly adept at spotting patterns and line graphs make this process
very easy. This makes the line graph a great choice for keeping an eye on important business metrics.
View more Line graph examples here
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Main Features Summary
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