It is currently 21 Jul 2019, 09:27

### GMAT Club Daily Prep

#### Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

# The table above shows the values of the quadratic function f

 Question banks Downloads My Bookmarks Reviews Important topics
Author Message
TAGS:
Founder
Joined: 18 Apr 2015
Posts: 7401
Followers: 125

Kudos [?]: 1451 [0], given: 6611

The table above shows the values of the quadratic function f [#permalink]  14 May 2019, 08:27
Expert's post
00:00

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions
Attachment:

#GREpracticequestion The table above shows the values of the quadratic function.jpg [ 11.81 KiB | Viewed 453 times ]

The table above shows the values of the quadratic function f for several values of x. Which one of the following best represents f ?

(A) $$f(x) =− 2x^2$$

(B) $$f(x) = x^2 +3$$

(C) $$f(x) =−x^2 +3$$

(D) $$f(x) =− 2x^2 −3$$

(E) $$f(x) =− 2x^2 +3$$
[Reveal] Spoiler: OA

_________________
MyGuru Representative
Affiliations: Partner at MyGuru LLC.
Joined: 13 May 2019
Posts: 117
Location: United States
GMAT 1: 770 Q51 V44
GRE 1: Q169 V168
WE: Education (Education)
Followers: 1

Kudos [?]: 103 [0], given: 2

Re: The table above shows the values of the quadratic function f [#permalink]  14 May 2019, 08:43
Expert's post
If presented algebra in a non-algebraic format, recognize that the GRE may be attempting to get test-takers to waste time when a more intuitive solution may be available. When presented with variables in the answer choices, always consider if plugging in values may be a more efficient method to solve the problem as is the case here.

Plug in the first value x = -1 to eliminate any choices with functions that do not result in a value of 1

a) -2(1) ≠ 1 | eliminate a
b) 1 + 3 ≠ 1 | eliminate b
c) -1 + 3 ≠ 1 | eliminate c
d) -2 - 3 ≠ 1 | eliminate d
e) -2 + 3 = 1 | keep e

Since, no other choices survived just the first pair of values select choice E confidently without meddling with the exact formulas.
_________________

Stefan Maisnier

Sign up today for a free 30-minute online GRE tutoring session!

Re: The table above shows the values of the quadratic function f   [#permalink] 14 May 2019, 08:43
Display posts from previous: Sort by

# The table above shows the values of the quadratic function f

 Question banks Downloads My Bookmarks Reviews Important topics

 Powered by phpBB © phpBB Group Kindly note that the GRE® test is a registered trademark of the Educational Testing Service®, and this site has neither been reviewed nor endorsed by ETS®.