Suppose the Consumer's Utility Function Is Given By $U ( x , y ) = x y + y$

Multiple Choice

Suppose the consumer's utility function is given by $U ( x , y ) = x y + y$ where $\mathrm { MU } _ { \mathrm { x } } = \mathrm { y } \quad \mathrm { MU } _ { \mathrm { y } } = \mathrm { x } + 1$
The equation for this consumer's demand curve for $x$ when $\mathrm { I } > \mathrm { P } _ { \mathrm { x } }$ is:

A) $x ^ { d } = 0$
B) $\mathrm { x } ^ { \mathrm { d } } = \frac { 1 } { 2 P _ { x } }$
C) $x ^ { \mathrm { d } } = \frac { I } { 2 P _ { x } } - \frac { 1 } { 2 }$
D) $x ^ { d } = 1 / 2$