3 Below are 3 sketches from some students of the residuals from their linear regressions of \(y\) on \(x\).
\includegraphics[max width=\textwidth, alt={}, center]{54bf68ab-7934-432a-890f-20093082ab07-06_252_704_342_660}
\includegraphics[max width=\textwidth, alt={}, center]{54bf68ab-7934-432a-890f-20093082ab07-06_266_718_625_660}
\includegraphics[max width=\textwidth, alt={}, center]{54bf68ab-7934-432a-890f-20093082ab07-06_248_599_936_660}
\section*{III}
III
For each sketch you should state, giving your reason,
- whether or not the sketch is feasible
and if it is feasible - whether or not the sketch suggests a linear or a non-linear relationship between \(y\) and \(x\).