\chapter{Functions and graphs}
\section{Input and Output}
Answer the questions in your own words.
\begin{enumerate}
\item
Given a function \(f(x)\), how do we find the input values \(x\) that give output \(y\)?
\item Given a function \(f(x)\), what is a zero of \(f(x)\)?
\item
Given two functions \(f(x)\) and \(g(x)\), how do we find the input values \(x\) that make the
two outputs the same?
\item Consider the equation \(x^4+4x^2+4=0\). How should we re-name the variable to turn it into a
quadratic equation?
\item Answer the same question for the equation \(t^6 -t^3+20=0\).
\end{enumerate}