

\section*{Homework 4:}\label{p3hw1}
 Adapt the commands in the file \texttt{M3\_P2\_AffineModel.nb} to answer the following questions. Write your answers in a word-document and submit a hard-copy for grading.
\begin{enumerate}
\item Using the total distance function $H_4(m,b)$, find the optimal model for the test data. Provide a graphic evidence that the model is valid.
\item Can the total distance function $P_1(m,b)$ be used to find a valid model? Explain your answer showing graphs that support your conclusion.
\item  Using any appropriate distance function, fit the best model of the form $y=mx+b$ to the data about the growth of plant roots from Problem 1. Comment on whether a model of the form $y=mx$ or a model of the form $y=mx+b$ is most suitable for this data.
\end{enumerate}
