Let $f ( x , y ) = x ^ { 2 } - y ^ { 2 }$

Multiple Choice

Let $f ( x , y ) = x ^ { 2 } - y ^ { 2 }$ . Then the level curve for z = 3 is

A) A circle
B) An ellipse
C) A hyperbola
D) A cardioid
E) A limaçon