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In the xy-plane, what is the y-intercept of line l?

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Intern
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Joined: 26 Jul 2017
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Re: In the xy-plane, what is the y-intercept of line l? [#permalink]

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New post 26 Jul 2017, 16:23
Can someone explain why it cannot work like this?

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Kudos [?]: 0 [0], given: 2

Intern
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Joined: 19 Apr 2017
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Kudos [?]: 10 [0], given: 17

Concentration: Strategy, Finance
Re: In the xy-plane, what is the y-intercept of line l? [#permalink]

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New post 13 Sep 2017, 06:09
anairamitch1804 wrote:
If the slope and y-intercept of a line in xy plane are m and c respectively, then the line can be represented by the equation y = mx + c and the x=intercept of the line will be -c/m

Statement 1: m = 3c ---> Not sufficient

Statement 2: -c/m = -1/3 ---> m = 3c ---> Not sufficient

1 & 2 Together: We have no new information ---> Not sufficient

hence E

The best and concise explanation, revealing a GMAT trick

Kudos [?]: 10 [0], given: 17

Re: In the xy-plane, what is the y-intercept of line l?   [#permalink] 13 Sep 2017, 06:09

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In the xy-plane, what is the y-intercept of line l?

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