It allows a quick look at the data to establish whether or not there is any relationship between the variables and also an indication of the nature of the relationship: linear, quadratic, power etc.
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ADVANTAGES Shows relationship between two variables best method to illustrate a non-linear pattern.
scatter plot
A scatter diagram.
The scatter diagram is used when the data is in a "Raw state" or what is referred to as "Raw Data". Example 10, 20,10,50,90,80,56,70,70,
scatter diagram