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The vertical line is known as the y axis. It is nothing more than a measuring stick to count how far up or down a point is from the horizontal line. The horizontal line, then, is known as the x axis and measures the distance left or right from the vertical line.
Horizontal or X-Axis: The horizontal or X-axis shows you the scale ofvalues into which the measurements fit. These measurements are generallygrouped into intervals to help you summarize large data sets. Individual datapoints are not displayed.3. Bars: The bars have two important characteristicsâheight and width.