Multiple regression and matracies?

[Rabolisk]

multipary regression and matracies?

So Iam supposed to have a test soon and I've never see people soving multiple regression using the matrix method. Since our class never uses the textbook, anyone have any links that show how to solve these kind of problems?

This is an exaple of the questions Iam getting

http://yfrog.com/0cecon318p

Soo yea any useful websites that explain how to solve them clearly? Cos Iam REALLY stumped

Thanks