Q.

Suppose, you got a situation where you find that your linear regression model is under fitting the data. In such situation which of the following options would you consider?
1. I will add more variables
2. I will start introducing polynomial degree variables
3. I will remove some variables

A. 1 and 2
B. 2 and 3
C. 1 and 3
D. 1, 2 and 3
Answer» A. 1 and 2
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