Exponential Regression
The exponential regression option finds the equation of an exponential equation of
the form y = abx or y = aebxthat 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 exponential regression, select option 09Rg_abx
using 
followed by eight
or select option 10Rg_aebx
using
followed by nine
Press 
and select one of the exponential regression options in the calculation screen.
Now press
followed by
.
Therefore, the best-fit exponential equation for this data is approximately
y = 11.78(1.133)x
which is equivalent to
y = 11.78(e0.125x)
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 both the correlation coefficient r and the
coefficient of determination r2.