GMAT Question of the Day - Daily to your Mailbox; hard ones only

 It is currently 24 Sep 2018, 04:46

### 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

# Which of the following equations has a graph that ca

Author Message
TAGS:

### Hide Tags

Math Revolution GMAT Instructor
Joined: 16 Aug 2015
Posts: 6227
GMAT 1: 760 Q51 V42
GPA: 3.82
Which of the following equations has a graph that ca  [#permalink]

### Show Tags

03 Jul 2018, 01:52
00:00

Difficulty:

65% (hard)

Question Stats:

40% (01:31) correct 60% (00:57) wrong based on 43 sessions

### HideShow timer Statistics

[GMAT math practice question]

Which of the following equations has a graph that can pass through only one coordinate ($$x,y$$) in which both $$x$$ and $$y$$ are integers?

$$A. y=2x$$
$$B. y=\sqrt{2}*x+1$$
$$C. y= \frac{1}{x^2} - 1$$
$$D. y=\frac{1}{x^3}$$
$$E. y=(\frac{-1}{x})+1$$

_________________

MathRevolution: Finish GMAT Quant Section with 10 minutes to spare
The one-and-only World’s First Variable Approach for DS and IVY Approach for PS with ease, speed and accuracy.
"Only $99 for 3 month Online Course" "Free Resources-30 day online access & Diagnostic Test" "Unlimited Access to over 120 free video lessons - try it yourself" Math Expert Joined: 02 Aug 2009 Posts: 6803 Re: Which of the following equations has a graph that ca [#permalink] ### Show Tags 03 Jul 2018, 05:20 1 MathRevolution wrote: [GMAT math practice question] Which of the following equations has a graph that can pass through only one coordinate ($$x,y$$) in which both $$x$$ and $$y$$ are integers? $$A. y=2x$$ $$B. y=\sqrt{2}*x+1$$ $$C. y= \frac{1}{x^2} - 1$$ $$D. y=\frac{1}{x^3}$$ $$E. y=(\frac{-1}{x})+1$$ If you look at the choices, all are with power of x, and these can take values of 1 and -1 and still give integer value for y.... but $$y=\sqrt{2}*x+1.......$$.. y can be integer only when $$\sqrt{2}*x]$$ is integer and it cannot be integer when x is integer except when x =0.. so our answer _________________ 1) Absolute modulus : http://gmatclub.com/forum/absolute-modulus-a-better-understanding-210849.html#p1622372 2)Combination of similar and dissimilar things : http://gmatclub.com/forum/topic215915.html 3) effects of arithmetic operations : https://gmatclub.com/forum/effects-of-arithmetic-operations-on-fractions-269413.html GMAT online Tutor Math Revolution GMAT Instructor Joined: 16 Aug 2015 Posts: 6227 GMAT 1: 760 Q51 V42 GPA: 3.82 Re: Which of the following equations has a graph that ca [#permalink] ### Show Tags 05 Jul 2018, 00:50 => A. $$x = 1, y = 2$$ and $$x = 2, y = 4$$ lie on this graph. B. Since $$√2$$ is irrational, the only point on this graph with integer coordinates is $$x = 0, y = 1$$. C. $$x = 1, y = 0$$ and $$x = -1, y = 0$$ lie on this graph. D. $$x = 1, y = 1$$ and $$x = -1, y = -1$$ lie on this graph. E. $$x = 1, y = 0$$ and $$x = -1, y = 2$$ lie on this graph. Therefore, the answer is B. Answer: B _________________ MathRevolution: Finish GMAT Quant Section with 10 minutes to spare The one-and-only World’s First Variable Approach for DS and IVY Approach for PS with ease, speed and accuracy. "Only$99 for 3 month Online Course"
"Free Resources-30 day online access & Diagnostic Test"
"Unlimited Access to over 120 free video lessons - try it yourself"

Re: Which of the following equations has a graph that ca &nbs [#permalink] 05 Jul 2018, 00:50
Display posts from previous: Sort by

# Which of the following equations has a graph that ca

## Events & Promotions

 Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne Kindly note that the GMAT® test is a registered trademark of the Graduate Management Admission Council®, and this site has neither been reviewed nor endorsed by GMAC®.