Casio FX-82MS Manuale Utente
E-27
u Logarithmic, Exponential, Power, and Inverse
Regression
• Use the same key operations as linear regression to re-
call results for these types of regression.
• The following shows the regression formulas for each
type of regression.
u Quadratic Regression
• The regression formula for quadratic regression is:
y
= A + B
x
+ C
x
2
.
• Example:
Perform quadratic regression to de-
termine the regression formula terms
for the data nearby. Next, use the
regression formula to estimate the
values for
termine the regression formula terms
for the data nearby. Next, use the
regression formula to estimate the
values for
n
(estimated value of
y
) for
x
i
= 16 and
m
(estimated value of
x
)
for
y
i
= 20.
In the REG Mode:
r 3
(Quad)
A
B
1
(Scl)
=
(Stat clear)
29
P
1.6
S
50
P
23.5
S
74
P
38.0
S
103
P
46.4
S
118
P
48.0
S
Regression Coefficient A =
–35.59856934
A X r r 1 =
Regression Coefficient B =
1.495939413
A X r r 2 =
Regression Coefficient C =
– 6.71629667
10
–3
A X r r 3 =
n
when
x
i
is 16 =
–13.38291067
16
A X r r r 3 =
m
1
when
y
i
is 20 =
47.14556728
20
A X r r r 1 =
m
2
when
y
i
is 20 =
175.5872105
20
A X r r r 2 =
Logarithmic Regression y
A B ⴢ In x
Exponential Regression y
A ⴢ
e
B
·
x
(In y
In A + Bx)
Power Regression
y
A ⴢ
x
B
(In y
In A + BIn x)
Inverse Regression
y
A B ⴢ
1
/
x
x
i
y
i
29
1.6
50
23.5
74
38.0
103
46.4
118
48.0