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# Circle C and line k lie in the xy plane. If the circle C is

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Manager
Joined: 31 Jul 2006
Posts: 220
Circle C and line k lie in the xy plane. If the circle C is  [#permalink]

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11 Oct 2008, 00:49
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Circle C and line k lie in the xy plane. If the circle C is centered at the origin and has radius 1, does line k intersect circle C?
a. The x intercept of line k is greater than 1
b. The slope of line k is -1/10

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Manager
Joined: 27 Sep 2008
Posts: 76

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11 Oct 2008, 02:09

we need to know the constant b in

y=ax+b

Manager
Joined: 31 Jul 2006
Posts: 220

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11 Oct 2008, 02:34
How do you determine if a line intersects the circle?
Manager
Joined: 07 Jan 2008
Posts: 84

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11 Oct 2008, 05:37
(a) x intercept is > 1. So it is possible that the line can intersect the circle or not intersect the circle.
(b) The -ve slope gives us the direction of the circle. But no clear intersection to the circle.

together they don't give the intersects.

So E.

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This is not a quality discussion. It has been retired.

If you would like to discuss this question please re-post it in the respective forum. Thank you!

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Re: Circle DS &nbs [#permalink] 11 Oct 2008, 05:37
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