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What do we do the curvilinear relationship in linear regression?

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What do we do the curvilinear relationship in linear regression? (a) consider (b) ignore (c) may be considered (d) sometimes consider The question was posed to me in examination. This question is from Linear Regression topic in division Commands, Packages, Visualizing Data and Linear Regression of R Programming Select the correct answer from above options

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Correct answer is (b) ignore The explanation: Linear regression models the straight-line relationship between Y and X. Any curvilinear relationship is ignored. This assumption is most easily evaluated by using a scatter plot.

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