The sinasiodal regression option finds the equation of the form

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 quadratic regression, select opton 14Rg_sin using followed by thirteen

Press and select sinasiodal regression in the calculation screen. Now press followed by .

Therefore, the best-fit sinasiodal equation for this data is approximately

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 .