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Bar Graphs and Line Graphs. Bar Graph. 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. Line Graph.
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Bar Graph • 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.
Line Graph • 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.