Question 1\ Let

x_(1)=[[1],[2],[-2]]

and let

x_(2)=[[-10],[2],[3]]

. Let

tilde(x)=[x_(1),x_(2)]

. Let

y=[[0],[1]]

\

tilde(w)=((tilde(x))tilde(x)^(TT))^(-1)tilde(x)y

. What is

w[1]

?\

-0.25

\ Not defined\

-0.125

\

-0.5

\ 0

Let x1=122 and let x2=1023. Let X~=[x1,x2]. Let y=[01] w~=(X~X~)1X~y. What is w[1]? 0.25 Not defined 0.125 0.5