February 19, 2017

Homework Help: Math (geometry)

Posted by Emily on Wednesday, April 30, 2008 at 7:09pm.

Line l is tangent to circle O at point P(3,4) where the center is located at (0,0).
a. Find the radius of the circle. (I got 4)
b. Give an equation of the circle. (I got x^2+y^2=16)
c. Find the slope of line l.
d. Give an equation of line l.

I can't figure out what the slope would be, if I knew that I could figure out (d). Does anybody know how to do this?

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