Power Regression
The power regression option finds the equation of an equation of
the form y = axb that best fits a set of data.
First, press 
selecting option AEDIT to
enter the data .
The data shown here is the points {(2,11.4) (3,17) (5,27.3) (7,36.1) (11,47.7) (13,49.9)}
Press
DREG to view the regression options.
For power regression, select opton 12Rg_axb
using 
followed by eleven
Press 
and select power regression in the calculation screen.
Now press
followed by
.
The best-fitting power equation for this data is:
y = 11.78x1.1
The regression equation can be automatically stored in the equation editor
by entering the name of the equation, such as y1, after (L1,L2 as follows:
choose option A
and select y1 followed by
.
Note: The Sharp calculates the correlation coefficient r,
and the coefficient of determination, r2.