Find $\frac{d y}{d x}$ At the Given Point $x y^{2}=4 ;(4,1)$ A) $-\frac{1}{2}$

Multiple Choice

Find $\frac{d y}{d x}$ at the given point.
- $x y^{2}=4 ;(4,1)$

A) $-\frac{1}{2}$
B) -2
C) -8
D) $-\frac{1}{8}$