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# coordinate ds paper test 31

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Manager
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coordinate ds paper test 31 [#permalink]

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23 Sep 2008, 04:11
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0% (00:00) correct 0% (00:00) wrong based on 1 sessions

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need explaination
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Senior Manager
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Re: coordinate ds paper test 31 [#permalink]

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23 Sep 2008, 04:40
I think this is a clear E. Taking the two statements together, we have a point, which lies on line l and we know that l is not perpendicular to the x-axis. So what...
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Re: coordinate ds paper test 31 [#permalink]

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23 Sep 2008, 04:42
lets consider (1):

Since line passes through (-2, 3) its equation can be given as:

y-3 = m (x +2) where m is the slope. ---- (a)

Now let's put (x,y) = (2, -3) in the equation (a)

-3-3 = m (2+2) ---> 4m + 6 =0

We don't know m, hence (1) is insufficient.

Let's consider (2)

l is not perpendicular to x axis. This tells us nothing useful.

When we combine (1) and (2) , we still don't have the value for m (slope of the line).

I think the answer should be (E)
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Re: coordinate ds paper test 31 [#permalink]

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23 Sep 2008, 07:28
It is a clear E.
Any line can pass through the point in 1.

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Re: coordinate ds paper test 31   [#permalink] 23 Sep 2008, 07:28
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# coordinate ds paper test 31

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