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# y=2x^2 + 7x -3

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y=2x^2 + 7x -3 [#permalink]  07 Sep 2017, 14:09
Expert's post
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Question Stats:

86% (00:42) correct 13% (00:46) wrong based on 15 sessions
$$y= 2x^2 + 7x - 3$$

 Quantity A Quantity B $$x$$ $$y$$

A)The quantity in Column A is greater.
B)The quantity in Column B is greater.
C)The two quantities are equal.
D)The relationship cannot be determined from the information given.

Practice Questions
Question: 5
Page: 112
Difficulty: medium
[Reveal] Spoiler: OA

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Joined: 18 Apr 2015
Posts: 5149
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Kudos [?]: 1030 [0], given: 4638

Re: y=2x^2 + 7x -3 [#permalink]  07 Sep 2017, 14:14
Expert's post
Explanation

If x = 0 then y = 2($$0^2$$) + 7(0) -3= -3 so in this case, x > y ; but if x = 1 then y = 2($$2^1$$) + 7(1) -3 = 6, so in this case , y > x.
Thus, the correct answer is Choice D, the relationship cannot be determined from the information given.
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Re: y=2x^2 + 7x -3 [#permalink]  01 Apr 2018, 21:53
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fact is y= 2x^2 + 7x -3

plugging in values
when x=0, y=-3 ==> x>y
when x=1, y=6==> x<y

here relationship varies, so ans iS D.
Re: y=2x^2 + 7x -3   [#permalink] 01 Apr 2018, 21:53
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# y=2x^2 + 7x -3

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