Statistics; Curve Fitting; Exponential Curve Fit - HP 12c Solutions Handbook

Curve Fitting

Exponential Curve Fit

Using the function of the HP-12C, a least squares exponential curve
fit may be easily calculated according to the equation y=Ae
exponential curve fitting technique is often used to determine the growth
rate of a variable such as a stock's value over time, when it is suspected
that the performance is non-linear. The value for B is the decimal value of
the continuous growth rate. For instance, assume after keying in several
end-of-month price quotes for a particular stock it is determined that the
value of B is 0.10. This means that over the measured growth period the
stock has experienced a 10% continuous growth rate.
If B>0, you will have a growth curve. If B
Examples of these are given below.
The procedure is as follows:
1. Press
2. For each input pair of values, key in the y-value and press
the corresponding x-value and press
3. After all data pairs are input, press
coefficient (between ln y and x).
4. Press 1
above.

Statistics

CLEAR .
0
.
to obtain the correlation
to obtain A in the equation
99
Bx
. The
, key in