The Rectangular Equation That Corresponds to the Polar Equation $r = 4 \cos \theta$

Multiple Choice

The rectangular equation that corresponds to the polar equation $r = 4 \cos \theta$ is

A) $x ^ { 2 } + y ^ { 2 } = 4 y$
B) $x ^ { 2 } + y ^ { 2 } = 4 x$
C) $x ^ { 2 } + y ^ { 2 } = - 4 x$
D) $x ^ { 2 } + y ^ { 2 } = - 4 y$
E) $y = - 4 x$