2			1	0	0
	2			1	1	0
y=	3		X=	1	0	0
	3			1	1	1
	5			1	1	1
						1	0	0
	1	1	1	1	1	1	1	0		5	3	2
XTX=	0	1	0	1	1	1	0	0	=	3	3	2
	0	0	0	1	1	1	1	1		2	2	2
						1	1	1
	0,5	-0,5	8,88178419700125E-17
(XTX)-1=	-0,5	1,5	-1
	0,00	-1	1,5
	15
XTy=	10
	8
			2,5
a=	(XTX)-1XTy=		-0,500000000000002
			2
t	yt	xt1	xt2	y^t	et	et2
1	2	0	0	2,5	-0,500000000000001	0,250000000000001
2	2	1	0	2	0	0
3	3	0	0	2,5	0,499999999999999	0,249999999999999
4	3	1	1	4	-0,999999999999999	0,999999999999998
5	5	1	1	4	1	1
						2,5
Se2=	1,25
			0,625	-0,625	1,11022302462516E-16
D2(a)=	Se2 (XTX)-1=		-0,625	1,875	-1,25
			0,00	-1,25	1,875
S(a0)=			0,790569415042095
S(a1)=				1,36930639376292
S(a2)=					1,36930639376292
Y^=	2,5-	0,5X1+	2X2
	(0,791)	(1,369)	(1,369)