ࡱ> JMI_  bjbj .>bbE~~8$DhTf( -//////$fSShF--ADX/FY~0a,, u, , SS, ~ : Plotting Points and the Line of Best Fit Plotting Points Turn calculator on by pressing the ON key on the TI-84 Plus keypad. It is the bottom key in the first column. The calculator will announce the screen it is on and vibrate. Press the Y= key (the first TI-84 Plus function key). If any equations are present, erase them by pressing the CLEAR key on the TI-84 Plus for each one. Press the STAT key (3rd column, 8th row on the TI-84 Plus) and the calculator will announce that you are in the STAT Menu, Edit Menu, and at Edit. Select 1:Edit by pressing ENTER on the TI-84 Plus, and the calculator announces that you are ready to enter data into the L1 data table at the first position by saying L1(1) = . Enter the data points from an x/y data table. First, enter each x value followed by pressing the ENTER or down arrow key on the TI-84 Plus. The calculator will announce each position as you go. After entering all the x values, press the TI-84 Plus right arrow, and the calculator announces that you are ready to enter data into the L2 data table at the first position by saying L2(1) = . Then enter each y value followed by pressing the ENTER or down arrow key on the TI-84 Plus. The calculator will again announce each position as you go. Use the data table below for your entries. L1 (x)L2 (y)12233647.559.9612 Go to STAT PLOT (2nd, Y= on the TI-84 Plus), and the calculator announces that you are in STAT PLOTS and are at Plot 1. Select 1: Plot 1 by pressing ENTER on the Orion TI-84 Plus. The calculator will announce ON selected. Select ON by pressing ENTER on the Orion TI-84 Plus. Use the Orion TI-84 Plus down arrow, and it will announce Scatter Plot, one of six, dot scatter plot selected, which is what you want. Press TRACE (the fourth TI-84 Plus function key), and the calculator announces P1: L1, L2. The scatter plot is formed, and the individual points can be played using the TI-84+ left and right arrows with tone mode on. To place the calculator in tone mode, hold down the SHIFT key and press the TOGGLE MODE key (bottom right plus top left key on the Orion), until you are in tone mode. Finding the Line of Best Fit (Regression Analysis). Press the STAT key again. Use the TI-84 Plus right arrow to select CALC. Use the TI-84 Plus down arrow to select 4: LinReg (ax+b) and press ENTER on the TI-84 Plus, and the calculator announces that you are there and at Xlist: L1. Use the TI-84 Plus down arrow to find Store Reg EQ: and then go to F4 (ALPHA, TRACE on the TI-84 Plus). The calculator will announce Y var menu, Y1. Press ENTER on the TI-84 Plus to select the storage space as Y1. Then use the TI-84 Plus down arrow to select Calculate and press ENTER. The calculator announces linear regression, the slope intercept form of a linear equation (y = ax + b) and the values for a and b. (In this case, a = 2.06 and b = -.49.) The linear regression equation is now stored in Y1. Press the Y= key, and the calculator will read the new equation to you. Press the TRACE key, and you can hear the new graph being plotted. Select the new equation with the TI-84+ up or down arrows, and play the graph by holding the SHIFT key and pressing the PREF key on the Orion portion. Clearing the Calculator. Press the STAT key (3rd column, 8th row on the TI-84 Plus) and the calculator will announce that you are in the STAT Menu, Edit Menu, and at Edit. Select 1:Edit by pressing ENTER on the TI-84 Plus, and the calculator announces that you are in the L1 data table at the first position by saying L1(1) = 1. Press the TI-84 Plus up arrow, and your cursor will now be over the title L1. Press the CLEAR key followed by the ENTER key on the Orion TI-84 Plus to clear all the contents of L1. Use the TI-84 arrow keys to move your cursor over the title L2, and clear all its contents as well. Go to STAT PLOT (2nd, Y= on the TI-84 Plus), and the calculator announces that you are in STAT PLOTS and are at Plot 1. Select 1: Plot 1 by pressing ENTER on the Orion TI-84 Plus. The calculator will announce ON selected. Use the Orion TI-84 Plus right arrow to find OFF and press ENTER on the Orion TI-84 Plus to select it. Press the Y= key on the Orion TI-84 Plus, and erase the y1 equation by pressing the Orion TI-84 Plus CLEAR key.     Susan A. Osterhaus Page  PAGE 4  DATE 12/8/2013 ()89\^ T Y } ~      , 1 2 ssՋh\h\PhbXh]~5CJ aJ hbXh0&5CJ aJ hbXh0&CJ aJ h]~h]~CJ H*aJ h0&h0&5CJ aJ h0&h0&CJ aJ h]~h3 CJ aJ h}#h}#5CJ aJ h}#CJ aJ h\Nh3 5CJ aJ h3 CJ aJ h]~h]~5CJ aJ h]~CJ aJ hY CJ$aJ$h0&h0&CJ$aJ$hG^CJ(aJ(hY CJ(aJ()9~      ! $Ifgd0&gdCn` & Fgd0& & Fgd]~ & FgdY $a$gdY 2 ]  ' , - / : P Q }         E F L U W X ·ׯׯyymmhCn`h0&5CJ aJ hCn`h0&CJ H*aJ hCn`h0&CJ aJ hbXhCn`CJ aJ h0&CJ aJ hCn`hCn`5CJ aJ hCn`CJ aJ hCn`hCn`CJ aJ hCn`5CJ aJ hbXhbX5CJ aJ hbXCJ aJ hbXh0&CJ aJ hbXhbXCJ aJ hbXh]~CJ aJ &! 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