Casio fx-9750G PLUS User Manual
Page 291
263
Calculating and Graphing Paired-Variable Statistical Data
18 - 4
k
k
k
k
k
Logarithmic Regression Graph
P.254
Logarithmic regression expresses
y
as a logarithmic function of
x
. The standard
logarithmic regression formula is
y
=
a
+
b
× In
x
, so if we say that X = In
x
, the
formula corresponds to linear regression formula
y
=
a
+
b
X.
6
(g)1(Log)
1 2 3 4 5
6
6
(DRAW)
a ......
regression constant term
b ......
regression coefficient
r ......
correlation coefficient
r
2
..... coefficient of determination
k
k
k
k
k
Exponential Regression Graph
P.254
Exponential regression expresses
y
as a proportion of the exponential function of
x
. The standard exponential regression formula is
y
=
a
×
e
bx
, so if we take the
logarithms of both sides we get In
y
= In
a
+
bx
. Next, if we say Y = In
y
, and A = In
a
,
the formula corresponds to linear regression formula Y = A +
bx
.
6
(g)2(Exp)
1 2 3 4 5
6
6
(DRAW)
a ......
regression coefficient
b ......
regression constant term
r ......
correlation coefficient
r
2
..... coefficient of determination