I have a question for you:

Now, the correct answers are: b,c,d,f
The problem is that I do not understand why...
I know that B=(X ' X)^-1X ' Y
In both models (X ' X)^-1X ' will be equal, however the Y vector containing the dependent variables will change.. The only thing I understand is that the intercept parameter will be the same.
If someone can help me with that I would really appreciate it! Also, if you happen to know a book or website where these things are explained please tell me!
