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\Huge{Precalculus Review}\\
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\normalsize
\noindent
\begin{enumerate}
\item Recall the definition of a function.  (If you cannot remember the definition of a function consult page 2 of your text.)


\begin{enumerate}
\item Draw an example of a graph that \emph{is} a function on the set of left axis and an example of a graph that is \emph{not} a function on the right axis. 

\includegraphics[height=2in]{blank_5}	\includegraphics[height=2in]{blank_5}	


\item Label the function whose graph on the left $f$.  What is the domain of $f$?

\vskip .75in
\item If -2 is in the domain of $f$, estimate $f(-2)$.
\vskip .5in
\item Is there an $x$ so that $f(x)=2$?  If so, estimate what it is.
\vskip .5in

\end{enumerate}

\item Recall linear functions.  (If you cannot remember consult \S 1.2 of your text.)
\begin{enumerate}
\item Find the slope of a line that passes through the points $(-2,1)$ and $(2,3)$.
\vskip .75in
\item Find the equation of the line that passes through the points $(-2,1)$ and $(2,3)$.

\end{enumerate}


\newpage
\item Consider a company that makes radios.  
\begin{enumerate}
\item Explain what fixed, variable, and total costs are.  
\vskip .9in
\item The machinery needed to make radios costs \$24,000 and each radio uses \$7 of supplies.  Write down the total cost of making $q$ radios.
\vskip .9in
\item Let the cost function be denoted with $C$.  Find $C(500)$.
\vskip .5in
\item Explain the statement $C(100)=24,700$ in terms of costs and radios.
\vskip .9in
\item Explain what the revenue of a company is.  (You may want to consult page 23 of your text if this doesn't sound familiar).
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\item If the radios sell for \$15 each, what is the revenue of the company if it sells all $q$ radios made?
\vskip .9in
\item How much profit would be made if the company produces $q$ radios?
\vfill
You can verify your answers by reading the examples on page 22, 23, 24, \& 25 of your text. 
\end{enumerate}








\end{enumerate}
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