Reciprocal Regression


The Reciprocal regression option finds the equation of the form

y = a + bx-1


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 reciprocal regression, select opton 11Rg_x-1 using followed by ten



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



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

y = 51.98 - 91.12x-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.