8. Because eiderly people may have difficulty standing to have their heights measured, a study looked at predicting overall height from height to the knee, Below are data (in centimeters) for five elderly men. \begin{tabular}{1[rrrrr} \hline Knee helght $x$ & $58.3$ & $48.0$ & $41.0$ & $46.1$ & $56.3$ \hline Height $y$ & $199.6$ & $154.6$ & $145.4$ & $163.6$ & $169.8$ \hline \end{tabular) Use your calculator or software: what is the equation of the least-squares regression line for predicting height from knee height? $y=2.5+42.1 x$ $\hat{y}=-1.0+0.3 x$ $\hat(y)=0.3+-1.0 x$ $y=42.1+2.5 x$ S.P.PB. 239