graph types
Time Series Graphs. Data is displayed in a time series graph at various time-points. This is another type of graph used for specific kinds of data that come in pairs. The vertical axis is for data values while the horizontal axis shows time. This kind of graph can be used for showing trends passing through a time period.
Bar charts and line charts, or combinations of the two, are very commonly used for the purpose of comparison. Line Graph Comparing Happiness and Age, Source: The Economist. Bar Chart Comparing Presidents and Executive Orders, Source: I Love Charts.