What is scale in bar graph??

The scale of a bar graph is the range of values presented along either the horizontal or vertical axis. The interval is the smallest quantity between two tick marks along an axis.

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In a bar graph, scale tells that what amount is held by each unit of the bar graph. It can vary in litres, metres, grams etc. It is a very important component of a bar graph, and a bar graph is incomplete without a scale.
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a scale tells the amount of each unit
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the bar graph scale is that tells us about the amount of quantity  and the scale is very important to the bar graph
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For a vertical bar graph, the scale for the vertical axis usually begins at zero and goes up to above the maximum data point. However, the scale does not have to start at zero. For instance, the sales figures for a company in October, November and December are $77, $78 and $82 respectively. If the vertical scale is from zero to 90 with an interval of 10, the difference in sales between the months is hardly noticeable. However, if the scale is from 74 to 85 with an interval of 2, the difference in sales between the months becomes very noticeable.

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