# Math Help - Least squares technique

1. ## Least squares technique

can anyone derive estimates of the $\beta$'s in the following models?

1. Yi = $\beta$0 + $\beta$1(xi + 5) + $\epsilon$i
2. Yi = $\beta$1xi + $\epsilon$i
3. Yi = $\beta$0 + $\epsilon$i
4. Yi = $\beta$0 + $\beta$1xi + $\beta$2wi + $\epsilon$i

where i = 1....n

i literally have no idea where im meant to start on this one?

2. Here is the simplest possible explanation of the Least Square method. Other than that I would urge you to continue querying the forum.

Example Method of Least Squares

Best regards,
wirefree