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

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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 Select the correct answer from above options

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

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