Posted by **Sarah** on Tuesday, August 20, 2013 at 11:44pm.

Find an equation of the tangent line to the circle x^2+y^2=25 at the point (4,-3)

- Math -
**Steve**, Wednesday, August 21, 2013 at 5:53am
at (x,y) the slope is -y/x

So, at (4,-3) the slope is 3/4.

- Math -
**Steve**, Wednesday, August 21, 2013 at 5:54am
Oops. The slope is -x/y.

SO, it's 4/3

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