# Thread: Find the equation of the tangent line(s) to the graph

1. ## Find the equation of the tangent line(s) to the graph

y^2-xy+3=0 at x= -4

Can you please show me how I would get my answer? Thank you everyone!

2. ## Re: Find the equation of the tangent line(s) to the graph

Originally Posted by schutzk21
y^2-xy+3=0 at x= -4

Can you please show me how I would get my answer? Thank you everyone!
Hint:

Implicit derivative :

$y'_{x,y}=\frac{y}{2y-x}$

Equation of the tangent line :

$y=y'_{x,y} \cdot x + b$

3. ## Re: Find the equation of the tangent line(s) to the graph

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