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Line l is tangent to a circle whose centre is at (3, 2).

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Line l is tangent to a circle whose centre is at (3, 2). If the point of tangency is (6, 6), what is the slope of line l ?

A. -4/3
B. -3/4
C. 0
D. 3/4
E. 4/3

[Reveal] Spoiler:
Hi, can someone please help me explain the solution of the above question. According to the solution set that i have, the ans is A, but i am not sure how. Thank you.

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