Least Square

Published on January 2017 | Categories: Documents | Downloads: 26 | Comments: 0 | Views: 297
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Kurva Larutan Standar kalsium (Ca)
70
60

f(x) = 1.99x + 0.53
R² = 1

50
40
absorbansi (Y)

30
20
10
0
0

5

10

15

20

konsentrasi (X)

x
5
10
15
20
25
30
Ʃx=10
5

y
10
21
30
41
50
60
Ʃy=21
2

Slope (m) =

=

xy
50
210
450
820
1250
1800
Ʃxy=4
580

x2
25
100
225
400
625
900
Ʃx2=22
75

x
Σ¿
¿
n ( Σ X 2 )−¿
n ( Σ XY )−Σ X . Σ Y
¿
6 .4850−105.212
6.2275−(105.105)

y = mx + c
y = 1.988x + 0.5333

25

30

35

5220
2625

=

= 1.988
Intersep (c) =

=

∑Y

-

n

212
6

Slope

-1.988

= 0.5333

∑X
n

105
6

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