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\begin{frame}
  \frametitle{Exponential Functions: Three Types}
  
  \begin{center}
  \begin{minipage}{.45\textwidth}
  \scalebox{.6}{
  \begin{tikzpicture}[default,baseline=0cm,scale=1.2,nodes={scale=.9}]
    {\diagram{-2.5}{2.5}{-.5}{3}{1}}
    \diagramannotatez
    \diagramannotatey{1}
    \begin{scope}[ultra thick]
    \draw[cblue] plot[smooth,domain=-1.6:2.5,samples=300] (\x,{.5^\x});
    \end{scope}
  \end{tikzpicture}
  }\\[.5ex]
  \centerline{{\small $f(x) = a^x$ with $0 < a < 1$}}
  \end{minipage}
  \begin{minipage}{.45\textwidth}
  \scalebox{.6}{
  \begin{tikzpicture}[default,baseline=0cm,scale=1.2,nodes={scale=.9}]
    {\diagram{-2.5}{2.5}{-.5}{3}{1}}
    \diagramannotatez
    \diagramannotatey{1}
    \begin{scope}[ultra thick]
    \draw[cgreen] plot[smooth,domain=-2.5:1.6,samples=300] (\x,{2^\x});
    \end{scope}
  \end{tikzpicture}
  }\\[.5ex]
  \centerline{{\small $f(x) = a^x$ with $a > 1$}}
  \end{minipage}
  \bigskip
  
  \begin{minipage}{.45\textwidth}
  \scalebox{.6}{
  \begin{tikzpicture}[default,baseline=0cm,scale=1.2,nodes={scale=.9}]
    {\diagram{-2.5}{2.5}{-.5}{3}{1}}
    \diagramannotatez
    \diagramannotatey{1}
    \begin{scope}[ultra thick]
    \draw[orange] plot[smooth,domain=-2.5:2.5,samples=300] (\x,{1^\x}) node [right] {$1^x$};
    \end{scope}
  \end{tikzpicture}
  }\\[.5ex]
  \centerline{{\small $f(x) = 1^x$}}
  \end{minipage}
  \begin{minipage}{.50\textwidth}
    \begin{itemize}
    \pause
      \item constant for $a = 1$
    \pause
      \item increasing for $a > 1$
    \pause
      \item decreasing for $0 < a < 1$
    \pause
      \item domain = $(-\infty,\infty)$
    \pause
      \item range = $(0,\infty)$ if $a\ne 1$
    \end{itemize}
  \end{minipage}
  \end{center}
\end{frame}