Question

How many coefficients do you need to estimate in a simple linear regression model (One independent variable)?

(a) 1

(b) 2

(c) 3

(d) 4

I have been asked this question by my college professor while I was bunking the class.

My enquiry is from Linear Regression in chapter Commands, Packages, Visualizing Data and Linear Regression of R Programming

Answer 1

The correct choice is (b) 2

The explanation: In simple linear regression, there is one independent variable so 2 coefficients (Y=a+bx+error).