The power regression option finds the equation of an equation of the form y = ax

The values of both x and y must be greater than zero. (This is because the method for determining the values of a and b in the regression equation is a least-squares fit on the values for ln x and ln y.) Press and use to select CALC.

Press . (The exponential regression option can also be obtained by using the to select option B and pressing .)

Therefore, the best-fit power equation for this data is approximately y = 0.84x

The TI-82 stores the regression equation. The equation can be graphed and is transfered to without typing the equation as follows. Press and use to select EQ.

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 .