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Learn how to create and interpret bar graphs, histograms, and line graphs effectively. Understand scales, intervals, and data visualization techniques. Improve your data analysis skills with practical examples. Suitable for students and professionals.
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Bar Graphs and Line Graphs Pro. K.S. Noonia Department of Geography
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.
Histogram • A histogram is a bar graph that shows the frequency of each item. Histograms combine data into equal-sized intervals. • There are no spaces between the bars on the histogram.
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.