Graphing Calculator Activities

Graphing Calculator Activities

<p> Graphing Calculator Activities Linear Regressions</p><p>1) Turn the calculator on and adjust the power setting. [2nd] then hold down []</p><p>2) Clear all previous entries. [y=] then [clear] on each line with an equation. [stat] [edit] [] [clear] [] for each list with data [2nd] [quit] to get out of the stat editor.</p><p>3) Enter new data into lists L1 and L2 [stat] [edit] then enter data [2nd] [quit] to get out of the stat editor.</p><p>4) Set up graph [2nd] [stat plot] [plotsoff] this turns off any extra graphs [2nd] [stat plot] [plot 1…] then choose the type, Xlist, Ylist, and Mark</p><p>[2nd] [quit] to get out of the stat plot editor.</p><p>5) Set graph window [window]</p><p>Xmin should be smaller than the smallest number in L1</p><p>Xmax should be larger than the largest number in L1 Xscl is the distance between tick marks on the X-axis</p><p>Ymin should be smaller than the smallest number in L2</p><p>Ymax should be larger than the largest number in L2 Yscl is the distance between tick marks on the Y-axis (or you can just hit [zoom] [stat] )</p><p>6) Graph the scatter plot [graph]</p><p>7) Perform the Linear Regression [stat] [calc] [LinReg (ax+b)] this pastes the command onto the home</p><p> screen. Now you need to type in [L1] , [L2] [enter] (On the TI-83 and 84, add [Y1] after the above command to paste.)</p><p>8) Paste equation into y= [y=] then select an empty line. [vars] [statistics] [enter] [eq] [RegEQ] [enter]</p><p>9) Graph the scatter plot and the regression line. [graph]</p><p>10) Find y-value, given an x-value [2nd] [calc] [value] [enter] then type in the x-value.</p><p>11) Find x-value, given a y-value [y=] select an open equation and enter the y-value. [graph] Find the intersection of the two lines. [2nd] [calc] [intersect] [enter] [enter] [enter] [enter]</p>

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