Fit a second degree parabolic curve to the following data:

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written 7.9 years ago by

• modified 4.1 years ago

Data :

x	1	2	3	4	5	6	7	8	9
y	2	6	7	8	10	11	11	10	9

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written 7.9 years ago by

teamques10 ★ 65k

We write X such that $ \sum X=0 $ . Here N=9 (odd)

x	$X_i$	$Y_i$	$X_i^2$	$X_i^3$	$X_i^4$	$X_iY_i$	$X_i^2Y_i$
1	-4	2	16	-64	256	-8	32
2	-3	6	9	-27	81	-8	54
3	-2	7	4	-8	16	-14	28
4	-1	8	1	-1 …

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