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Drawing an Exponential Regre
Exponential regression can be used when
x
. The normal exponential regression formula in this case is
logarithms of both sides, we get ln(
a
A = ln(
) and B = ln(
Cla
Pad Operation
Start the graphing operation from the Statistics application's Graph window or List window.
From the Graph window
Tap [Calc] [abExponential Reg] [OK] [OK]
From the Li t window
Tap [SetGraph][Setting...], or
On the Set StatGraphs dialog box that appears, configure a StatGraph setup with the
setting shown below, and then tap [Set].
Type: abExpR
Tap
to draw the graph.
The following is the exponential regression model formula in this case.
x
y
a
b
=
·
a
:
regression coefficient
b
:
regression constant term
r
:
correlation coefficient
2
r
:
coefficient of determination
MSe
: mean square error
• MSe =
n – 2
Graphing Paired-Variable Statistical Data
ion Graph (
y
) = ln(
b
), the formula corresponds to the linear regression formula Y = A + B·
.
n
1
(ln (y
) – (ln (a) + (ln (b)) x
i
i=1
7-5-11
y
a
b
=
·
y
is proportional to the exponential function of
y
=
a
b
x
) + (ln(
)) ·
. Next, if we say that Y = ln(
.
2
))
i
20060301
x
)
x
a
b
·
. If we take the natural
y
),
x
.
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