\magnification = \magstep1
\nopagenumbers
\leftline{Mathematics 241 -- Multivariable Calculus}
\leftline{Quiz 4 -- October 4, 2013}
\medskip
\leftline{Your Name: $\underline{\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ }$}
\bigskip
\noindent
A) (10) Is $\alpha(t) = (\cos(t),\sin(t))$ a flow line of the vector field $F(x,y) = (-y,x)$?  Why or why not?
\vglue 4.0truein
\noindent
B) (10) Plot the contours of $f(x,y) = x^2 - y^2$ for the contour values $c = -1,0,1$.  Label your contours
to show which is which.
\bye
