Kye

2021-01-31

Find the linear regression line for a scatterplot formed by the points and $\left(52,98\right).$ Round to the nearest tenth.

Arnold Odonnell

Step 1
The first value in each point represents the x-value, while the second value in each point represents the y-value.
$\begin{array}{|cc|}\hline x& y\\ 10& 261\\ 21& 252\\ 42& 209\\ 33& 163\\ 52& 98\\ \hline\end{array}$
Press on the Stat-button and then on press on ENTER (by which we will select 1:Edit...).
Enter the x-value in the list L1 and enter y-values in the list L2.
Next press on STAT, press $\mathrm{△}right$ (to select the CALC-tab), press $\mathrm{△}down$ three times until 4:LinReg is selected and then press on ENTER.
Next press 2nd and STAT (to open the LIST-menu) and press ENTER to select 1:L1.
Next press on "," (comma). Then press 2nd and STAT (to open the LIST-menu), press $\mathrm{△}down$ once and press ENTER to select 2:L2.

Finally, press enter again.
Result graphing calculator:

$b=308.3322$
${r}^{2}=0.7583$

Step 2
Thus and in

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