Choose the Stat option from the main menu.
Press
to view the statistics calculation options.

Press the menu key associated with the option.

Press to select one-variable statistics.

Press to select two-variable statistics.

Press to set the statistical settings.

Press to view regressions.

Press to select linear regression which finds the best-fit linear equation of the form y = ax + b.

Press to select med-med regression which finds another best-fit linear equation of the form y = ax + b.

Press to select quadratic regression which finds the best-fit quadratic equation of the form y = ax

Press to select cubic regression which finds the best-fit cubic equation of the form y = ax

Press to select quartic regression which finds the best-fit quartic equation of the form y = ax

Press to select logarithmic regression which finds the best-fit logarithmic equation of the form y = a + b ln x.

Press to select exponential regression which finds the best-fit exponential equation of the form y = ae

Press to select power regression which finds the best-fit power equation of the form y = ax

Press to select sinusoidal regression which attempts to finds an approximating equation of the form y = a sin(bx+c) + d.

Press to select logistic regression which attempts to finds an approximating equation of the form y = c / (1 + ae