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In the x–y plane, what is the y–intercept of the line l? [#permalink]
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16 Feb 2012, 16:35
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Question Stats:
42% (00:47) correct 58% (01:00) wrong based on 191 sessions
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In the x–y plane, what is the y–intercept of the line l? (1) The slope of the line l is 3 times its yintercept. (2) The x–intercept of line l is –1/3 As the OA is not given, I have arrived at answer C i.e both statements together are sufficient to answer the question. Please see below what makes me say this. Please let me know whether I am right or wrong.
Equation of line y = mx+c (1). Question is asking to find C.
Considering Statement 1 > m = 3c. So putting this value of m in (1) above we get y = c(3x+1). Not sufficient.
Considering Statement 2 > x intercept is 1/3 i.e. y = m/3+c. (2) Can't solve for C. Therefore insufficient.
Combining the statement 1 & 2 and substituting the value of m = 3c from statement 1 into statement 2. y = 3c/3+c => cc = 0 Therefore, y = 0. Therefore C is the right answer.
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Last edited by Bunuel on 05 Apr 2017, 03:04, edited 3 times in total.
Edited the question and added the OA



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Re: In the x–y plane, what is the y–intercept of the line l? [#permalink]
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16 Feb 2012, 20:14
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Re: In the x–y plane, what is the y–intercept of the line l? [#permalink]
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02 Jun 2012, 08:47
revised. I got it and have no question
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Last edited by LalaB on 02 Jun 2012, 09:43, edited 1 time in total.



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Re: In the x–y plane, what is the y–intercept of the line l? [#permalink]
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02 Jun 2012, 09:39
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Say the line is: Y=mX+b The question is: b=? Statement 1: m=3b, b=m/3, we do not know the value of m so b cannot be determined. Insufficient
Statement2: by plugging in point (0, 1/3), we get 0=m/3+b or m=3b. same as statement 1. Insufficient
Together: since, both are the same statement and both are insufficient, the answer is E.



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Re: In the x–y plane, what is the y–intercept of the line l? [#permalink]
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20 Dec 2015, 13:15
since the answer is confirmed at E, can the answer in the first post be updated? When I clicked E for my answer, it showed that the correct answer is C.



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Re: In the x–y plane, what is the y–intercept of the line l? [#permalink]
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06 Mar 2017, 22:11
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Re: In the x–y plane, what is the y–intercept of the line l? [#permalink]
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06 Mar 2017, 23:19
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Hi, Can someone confirm that the OA is wrongly set as C? Even Bunnuel got E as answer.
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Re: In the x–y plane, what is the y–intercept of the line l? [#permalink]
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05 Apr 2017, 03:05




Re: In the x–y plane, what is the y–intercept of the line l?
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