The answer depends on what information is graphed.
There are distance-time graphs, velocity-time graphs, speed-time graphs, acceleration-time graphs.
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Bar graphs and line graphs.
Cumulative frequency graphs or ogives are used to visually represent how many values are below a certain upper class boundary.
Bar graphs can compare two sets of data, as well as line graphs and circle graphs. To better improve my answer, double line graphs and double bar graphs compare two sets of data. Circle graphs cannot however, because they compare parts of a whole instead of, as a bar graph would, the amount of something. A circle graph is also incapable of showing data growth over a period of time, as line graphs do. All in all, circle graphs cannot compare to sets of data, and bar graphs and line graphs must be doubled to do so.
Bar graphs and line graphs.