Creating and Using Overheads

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Line graphs depict trends over long, continuous intervals. For instance, you would use a line graphs to show the number of women and men in Congress over thirty years.

The axis and grid provide a background for curves on a line graphs. Since you will typically have more than one trend depicted on this type of graphs, use different colors and label each trend.

Please note: If you can present your data in groups of time (i.e. 1960, 1970, 1980, 1990), consider using a column graphs instead.