A Particle Moves Along the Circle $x ^ { 2 } + y ^ { 2 } = 25$

A particle moves along the circle $x ^ { 2 } + y ^ { 2 } = 25$ . If x decreases at a rate 2 units per minute, at what rate is y changing when $x = 3$ ?

A) $2 \text { unit } / \min$

B) $\frac { 3 } { 2 } \text { unit } / \mathrm { min }$
C) $3 \text { unit } / \mathrm { min }$
D) $\frac { 1 } { 4 } \text { unit } / \mathrm { min }$
E) $- 2 \text { unit } / \min$
F) $- \frac { 3 } { 2 } \text { unit } / \mathrm { min }$

G) $- 3 \text { unit } / \min$

H) $- \frac { 1 } { 4 } \text { unit } / \mathrm { min }$