TI-89

 

To Enter Points:

 

APPS, 1: FlashApps. Then ENTER on Stats/List Editor. If you get a pop-up screen for folder selection, make sure that your current selected folder is main, then ENTER. Enter the x-values in list1 and the y-values in list2. ENTER after each value.

 

To Graph the Points:

 

  1.  

After you have entered the points: F2 Plots, and 1: Plot Setup. Then F1 Define. Leave the Plot Type as Scatter and the Mark as Box. In the x-box type list1. (Use alpha to access the (purple) letters. The letter  T  has its own button.) Then use ▼ to get to the y-box. In the y-box, type list2. Then ENTER twice.

 

2.  

               

F2 WINDOW. Set the window so that you will be able to see your (x,y) points.

 

      3.

                           

            F3 Graph.

 

 

To Turn Off Stat Plot:

 

APPS, 1: FlashApps. ENTER on Stats/List Editor. Then F2 Plots and 3: PlotsOff. Then QUIT ( 2nd ESC ).

 

 

 

REGRESSION

 

To Find  and Graph the Regression Equation:

 

  1. APPS, 1: FlashApps. ENTER on Stats/List Editor. Then F4 Calc and 3: Regressions. Use 1: LinReg for linear regression, 4: QuadReg for quadratic regression, 5: CubicReg for cubic regression, and so on.

 

  1. list1 should be in the X list and list2 should be in the Y list. In the “StoreRegEqn to:”line, use ► and then ▼ to select y1(x). ENTER and then ENTER again. You will now have the coefficients of the regression equation. Finally ENTER,

 


F3 GRAPH.

 

Note: You may have to change your WINDOW in order to see all of the points.

 

 

                 

 

Mark Wilson-Instructor

                                                                                                SJRCC

                                                                                                Revised: 8/03