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Which of the following may be used for linear regression?

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Which of the following may be used for linear regression? (a) X %*% Y (b) solve(A) (c) solve(A,B) (d) X * Y The question was posed to me by my college professor while I was bunking the class. This is a very interesting question from Commands in chapter Commands, Packages, Visualizing Data and Linear Regression of R Programming Select the correct answer from above options

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The correct choice is (c) solve(A,B) Easy explanation: solve(A,B) implies inverse of A * B.

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