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

Press and use to select CALC.

Press .

Therefore, the best-fit quadratic equation for this data is approximately y = - 0.16x

Press to view the regression equation and press . The equation is now entered in . Press . The data points can also be viewed. Access STAT PLOTS by pressing to turn the plots on. Press .

The TI-82 does not calculate the correlation coefficient r or the coefficient
of determination r^{2}.