When two variables are not perfectly correlated,the statistical technique of regression can be used to identify a line that will fit the data points perfectly.

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Quizplus · Accepted Answer

Regression is used to find the line that best fits the data points, but it is rare that the line will fit the data points perfectly, especially if there is noise or variability in the data. The line will generally have some error or residual associated with it.

When Two Variables Are Not Perfectly Correlated,the Statistical Technique of Regression