The Rectangular Equation of the Plane Curve, with Parametric Equations $x ( t ) = e ^ { - t } , y ( t ) = 3 e ^ { t }$

Multiple Choice

The rectangular equation of the plane curve, with parametric equations $x ( t ) = e ^ { - t } , y ( t ) = 3 e ^ { t }$ with $t \in ( - \infty , \infty )$ , is

A) $y = \frac { 3 } { x }$
B) $y = \frac { x } { 3 }$
C) $y = - \frac { 3 } { x }$
D) $y = 3 x$
E) $y = - \frac { x } { 3 }$