Find the equation y = Bo + B₁ of the least-squares line that best fits the five points (-3, 4), (-1,2), (1, 1), (3,-2), and (5,-4).

Elementary Linear Algebra (MindTap Course List)
8th Edition
ISBN:9781305658004
Author:Ron Larson
Publisher:Ron Larson
Chapter5: Inner Product Spaces
Section5.CR: Review Exercises
Problem 62CR
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Find the equation y Bo + B₁ of the least-squares line that best fits the five points (-3,4), (-1,2),
(1, 1), (3,-2), and (5,-4).
Transcribed Image Text:= Find the equation y Bo + B₁ of the least-squares line that best fits the five points (-3,4), (-1,2), (1, 1), (3,-2), and (5,-4).
Answer
The best-fit line is y=-x I.
be
should
Transcribed Image Text:Answer The best-fit line is y=-x I. be should
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Follow-up Question

How did you get 1=5a+5b

I understand how you got all the values for the formula but why did you write an=5a?

five points
x
- 3
- 1
1
5
[x = 5
Step 2
where
Normal ea.
Line
By
→7
&
(-3,4); (-1,2); (1,1), (3,-2); (5,-u)
y
x²
xy
9
-12
1
1
9
25
[x²=45
4
2
1
-2
-4
Σy = 1
Line
- 39 =
a =
y =
are
y = a + bx
Sa+5b
5a +45 b
y = 6/15-x
615
-2
1
-6
-20
Σxy=-39
Σy = (an
bex
Σxy = a[x+b[x²
- 40b =
uo
→ b = -1
-x
5
Answer
}=
Transcribed Image Text:five points x - 3 - 1 1 5 [x = 5 Step 2 where Normal ea. Line By →7 & (-3,4); (-1,2); (1,1), (3,-2); (5,-u) y x² xy 9 -12 1 1 9 25 [x²=45 4 2 1 -2 -4 Σy = 1 Line - 39 = a = y = are y = a + bx Sa+5b 5a +45 b y = 6/15-x 615 -2 1 -6 -20 Σxy=-39 Σy = (an bex Σxy = a[x+b[x² - 40b = uo → b = -1 -x 5 Answer }=
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