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Graphs

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Graphs

Bar, Line, Circle

- A bar graph uses vertical or horizontal bars to display numerical information.
- Bar graphs can be used to compare amounts.
- Choose an appropriate scale (with regular intervals).
- The bars should have the same width.

- A line graph uses a series of line segments to show changes in data over time.
- Plot a point for each data item, and then connect the dots with straight line segments.

Refer to page 336 for the line graph.

A circle graph is a graph of percentages where the entire circle represents the whole (100%).

Each wedge represents a percentage of the whole.

Start with 50%. 50% = ½

Now look at 40%. 40% will be almost all of the top half.

40%

10%

The remainder is labeled with 10%.

50%