Answer
Predicted final grade for 5 absences:
$ŷ=74.595$
$Residual=73.9-74.595=-0.695$
As $Residual\lt0$, the final grade is below average.
Work Step by Step
Predicted final grade for 5 absences:
Use the least-squares regression line obtained in part (a) with $x=5$:
$ŷ =−2.827x+88.73$
$ŷ =−2.827\times5+88.73$
$ŷ=74.595$
In the given data:
$Final~grade_{5~absences}=73.9$
$Residual=73.9-74.595=-0.695$
