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**en.wikipedia.org**/wiki/**Bar_chart**

A bar chart or bar graph is a chart or graph that presents categorical data with rectangular bars with heights or lengths proportional to the values that they represent. The bars can be plotted vertically or horizontally. A vertical bar chart is sometimes called a line graph.

www.smartdraw.com/**bar-graph**

What is a Bar Graph Used For. A bar graph (also known as a bar chart or bar diagram) is a visual tool that uses bars to compare data among categories. A bar graph may run horizontally or vertically. The important thing to know is that the longer the bar, the greater its value. Bar graphs consist of two axes.

**www.mathsisfun.com**/data/**bar-graphs**.html

We can show that on a bar graph like this: It is a really good way to show relative sizes: we can see which types of movie are most liked, and which are least liked, at a glance. We can use bar graphs to show the relative sizes of many things, such as what type of car people have, how many customers ...

**nces.ed.gov**/nceskids/help/user_guide/**graph**/whentouse.asp

. . . a Line graph. Line graphs are used to track changes over short and long periods of time. When smaller changes exist, line graphs are better to use than bar graphs. Line graphs can also be used to compare changes over the same period of time for more than one group.

www.thoughtco.com/**what-is-a-bar-graph**-3126357

Bar graphs are similar to pie chart since they are both graphs that are used for qualitative data. In comparing pie charts and bar graphs, it is generally agreed that between these two kinds of graphs, bar graphs are superior.

www.quora.com/What-are-**bar**-**graphs-and-pie-charts-used-for-in-statistics**

Different types of bar graph: *Horizontal bar graph *Three-dimensional bar graph *Compound and composite bar graphs *Frequency polygons. Pie charts and bar graphs are used in statistics. Statistics is the collection, organization, and processing of data. Organizing and analyzing data helps make large quantities of information easier to understand.

www.reference.com/math/use-**bar**-**graph**-aea3428144343af9

When Do You Use a Bar Graph? A bar graph is used to compare items between different groups and track changes over a period of time. Bar graphs are best used for changes that happen over a large amount of time instead of just months or weeks.

**nces.ed.gov**/nceskids/**graph**ing/classic/**bar**.asp

Bar Graph. There are all kinds of charts and graphs, some are easy to understand while others can be pretty tricky. There are many different types because each one has a fairly specific use. Bar graphs can be used to show how something changes over time or to compare items. They have an x-axis (horizontal) and a y-axis (vertical).

www.thoughtco.com/definition-of-**bar-graph**-2312368

The bars on a bar graph may be the same color, though different colors are sometimes used to distinguish between groups or categories to make the data easier to read and interpret. Bar graphs have a labeled x-axis (horizontal axis) and y-axis (vertical axis). When experimental data is graphed, the independent variable is graphed on the x-axis, while the dependent variable is graphed on the y-axis.

projects.ncsu.edu/labwrite/res/gh/gh-**bargraph**.html

Range bar graphs represents the dependent variable as interval data. The bars rather than starting at a common zero point, begin at first dependent variable value for that particular bar. Just as with simple bar graphs, range bar graphs can be either horizontal or vertical. Notice in the horizontal example above, a reference line is used to ...

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