The cubic regression option finds the equation of a cubic equation of the form y = ax

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 cubic regression, select opton 05Rg_x

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

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 .

The Sharp does not calculate the correlation coefficient r, but it does calculate the coefficient of determination, r