But if they are arranged equally, the correlation is low. If all the dots are close to making a straight line, the correlation is high. If there is no dependent variable, then either of the variables can be plotted on any axis and chart provides us with the degree of difference between these two variables, which is better known as correlation. The dependant or measured variable is plotted along the Y-axis. The independent variable also called the control parameter, that systematically increases, or decreases is plotted along the horizontal or x-axis. The main use of scatter charts is to draw the values of two series or variables and compare them over time or any other parameter. The first variable is independent, and the second variable is dependent on the first one. This chart is between two points or variables. Scatter charts are known by different names, scatter graph, scatter plot, scatter diagram or correlation chart. Unlike other charts, that uses lines or bars this chart only uses markers or dots.
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