Casio FX6300G - Page 158

CASIO PROGRAM SHEET
Program for
Regression curve
Description
i Logarithmic regression curve
Regression formula: ^ = A + Blnx
n-E(y- Inx)- £ Inx• Ey
B = -
wi:(lnjc)2-(Einjc)2
'Ey- B • £ Injr
ii Exponential regression curve
Regression formula: y = A-eBx
nE(xlny)~ Ex - Elny
B= -
A = e
n-Ex2-(Ex)2
E\ny-B-Ex\
iii Power regression curve
Regression formula: j> = A - * b
n £(ln .y-lny)-£ln.y»£lny
B =
A =
n - £ (In*)2 - (£ Inx)2
£lny-B »£ln.x
*See page 162 for an example.
Preparation and operation
• Store the program written on the next page.
Memory contents
A
A or InA
H £(ln*)2 0
V
E *
B
B
1
P
£ y 2
W
n
C
E Inx
J
Q
z y
X
X data
D Elny
K
R
Exy
Y
y data
E XElny
L
S
For selection of 1 ~3 Z
F
YE\nx M
T
G
£(lnx*lny) N U E * 2
- 1 6 0 -