line graphs and bar graphs need to made to enhance illustration whenever required for comparison
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Graphs are intended to present information as clearly as possible, and to do that you need to understand the types of graphs you have to choose from, as well as what makes one more suitable for some situations than the alternatives. If you need to use graphs in any setting, you’ll need to familiarize yourself with bar graphs and line graphs in particular, because they’re some of the most commonly used graphs around. Bar graphs use rectangular blocks to represent many different types of data, whereas line graphs use lines and represent trends over time particularly well.
Bar graphs show data with blocks of different lengths, whereas line graphs show a series of points connected by straight lines. This leads to a very different appearance, but the biggest difference is that bar graphs are more versatile while line graphs are better for showing trends over time or another measure with a logical progression of values (such as distance from a given point). Bar graphs can also show frequency distributions (how often you observe different outcomes) much more effectively than line graphs.
What Is a Bar Graph?
Bar graphs involve rectangular blocks of varying heights, and the height of the block corresponds to the value of the quantity being represented. The vertical axis shows the values – for example, the total number of each type of object counted – and the horizontal axis shows the categories. As a concrete example, if you’re counting the different types of vehicles in a parking lot, the individual blocks could represent cars, vans, motorcycles and jeeps, and their heights could represent how many you counted.
The bars can represent pretty much anything you can fit into categories, though, or even the values of the same quantity at different points in time. The height of the bar could also represent a wide range of things, including counts, total revenues, percentages, frequencies or values in any unit of measurement (e.g., heights, speeds or masses). Bar graphs are incredibly versatile, so anybody dealing with data will undoubtedly use them often.
What Is a Line Graph?
A line graph differs from a bar graph in that you plot individual points on the two axes and join neighboring points up using straight lines. The vertical axis could represent basically anything, but the horizontal axis ordinarily represents time. The continuous line (or lines) implies a trend over time or at least over some quantity that increases sequentially, like distance from a given point. The appearance of line graphs differs in quite an obvious way from bar graphs (because there are only thin lines plotted on the axes rather than large blocks), but the function differs substantially too. Line graphs can also represent trends in numerous quantities over time, by using multiple lines instead of just one.
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