Question

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

Answer 1

The correct choice is (c) solve(A,B)

Easy explanation: solve(A,B) implies inverse of A * B.