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# Q34: If Line k in the xy-plane has equation y = mx + b,

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Q34: If Line k in the xy-plane has equation y = mx + b, [#permalink]  08 Jul 2007, 20:14
Q34:
If Line k in the xy-plane has equation y = mx + b, where m and b are constants, what is the slope of k?
(1) k is parallel to the line with equation y = (1-m)x + b +1.
(2) k intersects the line with equation y = 2x + 3 at the point (2, 7).
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Re: xy-plane [#permalink]  08 Jul 2007, 20:24
jet1445 wrote:
Q34:
If Line k in the xy-plane has equation y = mx + b, where m and b are constants, what is the slope of k?
(1) k is parallel to the line with equation y = (1-m)x + b +1.
(2) k intersects the line with equation y = 2x + 3 at the point (2, 7).

stmt 1: m = (1-m) [Slopes of parallel lines are equal]
=> 2m = 1; m = 1/2. Sufficient.

stmt 2: Insufficient.

Hence, A.
Re: xy-plane   [#permalink] 08 Jul 2007, 20:24
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