We will have price on the x-axis and the amount of coffee sold on the y-axis. We can denote price as P and amount as A.
\[
\begin{tikzpicture}
\draw[->] (-1,0) -- (4,0) node[right] {$P$};
\draw[->] (0,-1) -- (0,4) node[above] {$A$};
\end{tikzpicture}
\]
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