The median-median line option finds the median-median line of the form y = ax + b using the given data points. First, enter the data. Press

Press and use to select CALC.

Press . (The median-median line option can also be obtained by using the to select option 4 and pressing .)

Therefore, the equation of the median-median line for this data is y = 0.25x - 0.25.

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 .