The Graph of the Function $f ( x ) = \frac { 3 x } { x + 1 }$

Multiple Choice

The graph of the function $f ( x ) = \frac { 3 x } { x + 1 }$ is shown below. Determine the vertical and horizontal asymptotes of its graph.

A) $\text { horizontal: } y = - 1 \text {; vertical } x = 3$
B) $\text { horizontal: } y = 3 \text {; vertical } x = - 3$
C) $\text { horizontal: } y = 3 \text {; vertical } x = - 1$
D) $\text { horizontal: } y = - 3 \text {; vertical } x = - 1$
E) $\text { horizontal: } y = 3 \text {; vertical } x = 1$