\documentclass{exam}[12pt]

\usepackage{amsfonts,amsmath}

\boxedpoints

\addpoints
\pointsinmargin

\begin{document}
\pagestyle{head}

\firstpageheader{\large Calculus I}{\bf\Large Derivatives}{\large Name:\hspace{1in} }
%\extraheadheight{.7in}
%\extrafootheight{-1in} 
%\small{\textit{Work all questions completely.  Show all work.}}

\begin{questions}
\large{
%\question Use the definition to find the derivative of $f(x)=x^2 + 3x$. 
%\vspace{2.2in}

\question Use the definition to find the derivative of $f(x)=4x^2 +2x-3$. 
\vspace{2.7in}

\question Use the definition to find the derivative of $f(x)=\frac{3}{2x-1}$.

\vspace{3.2in}
\question Use the definition to find the derivative of $f(x)=\sqrt{2x-1}$.


} 
\end{questions}
\end{document}