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Q:

What are the advantages and disadvantages of a graph?

A:

The primary advantage of using a graph or chart in a presentation is that they help the audience to visualize the point of the presentation. Graphs emphasize the main point, make the data more convincing, provide a compact way of presenting information and help audiences stay engaged. Disadvantages of graphs include being time consuming to construct and costly to produce. They also require technology that some may lack.

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Graphs have several purposes, including showing and comparing data and illustrating facts. Seven main types of graphs exist: the bar or pareto graph, the pie chart or circle graph, the histogram, stem and leaf plots, dot plots, scatterplots, and time-series graphs. Bar or pareto graphs show a bar for each category or set of data that is qualitative. Pie graphs show data in the form of a pie, and each piece of the pie represents a different data set. Histograms look similar to bar graphs, and they illustrate quantitative and not qualitative data. Stem and leaf plots illustrate quantitative data and emphasize the high point in the data. Dot plots are combination of histograms and stem-and-leaf plots. Scatterplots use correlation and regression to show trends. Time-series graphs display data at different points in time.

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Why do stars twinkle?

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• A:

A stem and leaves graph, also known as a stem and leaf plot, is a special table used in mathematics. Within a stem and leaves graph, each data value is split into a stem, which is the first digit or digits, and a leaf, which is usually the last digit.

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The first step in graphing an inequality is to draw the line that would be obtained, if the inequality is an equation with an equals sign. The next step is to shade half of the graph.

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To graph a slope, it's best to have the graph's equation already in slope-intercept form, which is y=mx+b. In this equation, m is the slope — often represented as a fraction and b is the y-intercept, or the point at which the line crosses the y-axis.