HP 12C Solutions Handbook

103
Logarithmic Curve Fit
If your data does not fit a line or an exponential curve, try the following
logarithmic curve fit. This is calculated according to the equation
y = A + B
(ln
x), and all x values must be positive.
A typical logarithmic curve is shown below.
The procedure is as follows:
27.34 A
0.31 B
0.36 Effective growth rate.
7
232.35
Projected price at the end of year 7
(1982).

HP 12C Specifications

General

Type	Financial Calculator
Display	LCD, 10 digits
Manufacturer	Hewlett-Packard
Programming	Keystroke
Memory	20 memory registers
Functions	statistical functions
Dimensions	12.7 x 7.87 x 1.52 cm (5 x 3.1 x 0.6 in)