\documentclass[10pt,envcountsect]{beamer}

\mode<presentation> {
  \usetheme{Warsaw}
}

\usepackage[english]{babel}
\usepackage[latin1]{inputenc}
\usepackage{times}
\usepackage[T1]{fontenc}
\usepackage{pstricks}
\usepackage{multicol}



\begin{document}

\title{AP 12 -- Solving system graphically}
\subtitle{European section, season 1}
\date{}

\begin{frame}
  \titlepage
\end{frame}

\begin{frame}{Draw a line}

\Large

\begin{center}
Draw the line whose equation you've been given on the tracing paper.
\end{center}

\bigskip

\begin{itemize}
\item Place the origin at the center of the page.
\item Put the $y$-axis along the length of the sheet and the $x$-axis along the the width.
\item Use unit 1cm on both axes.
\end{itemize}

\end{frame}

\begin{frame}{Your first task}

\large

\begin{itemize}
\item Find someone in the class such that the solution of the system made of your two equations is one of the couples of coordinates below.
\item Check your answer algebraically. 
\item Write the system and the solution on your answer sheet.
\end{itemize}

\Large

\begin{center}
$(-5,2)$ \hspace{1cm} $(-2,3)$ \hspace{1cm} $(2,4)$ \smallskip

$(6,3)$ \hspace{1cm} $(6,-2)$ \hspace{1cm} $(3,1)$ \smallskip

$(-2,-2)$ \hspace{1cm} $(-6,-1)$ \smallskip 

$(0,-5)$ \hspace{1cm} $(2,-4)$ \smallskip

\end{center}

\end{frame}

\begin{frame}{Your second task}

\Large

\begin{itemize}
\item Choose a partner in the class.
\item Use your tracing paper sheets to find an approximate solution to the system made of your two equations.
\item Solve the system algebraically to check your answer.
\item Change partners.
\item Your mark will depend on the number of system you solved.
\end{itemize}



\end{frame}



\end{document}
