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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:

91% (00:51) correct 8% (00:46) wrong based on 23 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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Moderator
Joined: 18 Apr 2015
Posts: 5919
Followers: 96

Kudos [?]: 1159 [0], given: 5501

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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Intern
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Re: y=2x^2 + 7x -3 [#permalink]  01 Apr 2018, 21:53
1
KUDOS
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.
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Re: y=2x^2 + 7x -3 [#permalink]  09 Feb 2019, 15:02
1
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Expert's post
Carcass wrote:
$$y= 2x^2 + 7x - 3$$

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

Let's test some values.

Case i: x = 0
Plug x = 0 into the given equation to get: y = 2(0)² + 7(0) - 3
Simplify to get to get: y = -3

We get:
QUANTITY A: 0
QUANTITY B: -3
In this case, Quantity A is greater than Quantity B

Case ii: x = 1
Plug x = 1 into the given equation to get: y = 2(1)² + 7(1) - 3
Simplify to get to get: y = 6

We get:
QUANTITY A: 1
QUANTITY B: 6
In this case, Quantity B is greater than Quantity A

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Re: y=2x^2 + 7x -3   [#permalink] 09 Feb 2019, 15:02
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