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 Your Progress

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

Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.

It appears that you are browsing the GMAT Club forum unregistered!

Signing up is free, quick, and confidential.
Join other 350,000 members and get the full benefits of GMAT Club

Registration gives you:

Tests

Take 11 tests and quizzes from GMAT Club and leading GMAT prep companies such as Manhattan GMAT,
Knewton, and others. All are free for GMAT Club members.

Applicant Stats

View detailed applicant stats such as GPA, GMAT score, work experience, location, application
status, and more

Books/Downloads

Download thousands of study notes,
question collections, GMAT Club’s
Grammar and Math books.
All are free!

Thank you for using the timer!
We noticed you are actually not timing your practice. Click the START button first next time you use the timer.
There are many benefits to timing your practice, including:

Why not C? Using Point A and B, equation of line joining both points can be found, finally slope ( say m) We know that line is perpendicular with those parallel lines. (So slope of these lines will be -1/m) Using one Point A and slope (-1/m) we can derive equation Like wise, Point B can be done.

Why not C? Using Point A and B, equation of line joining both points can be found, finally slope ( say m) We know that line is perpendicular with those parallel lines. (So slope of these lines will be -1/m) Using one Point A and slope (-1/m) we can derive equation Like wise, Point B can be done.

Please explain

Do we know that the line joining points A and B is perpendicular to these parallel lines??... The figure suggests so, however, there is no mention of that in the question statement.. We cannot determine that this line is perpendicular... _________________

Did you find this post helpful?... Please let me know through the Kudos button.

Re: What are the equations of the two parallel lines shown here? [#permalink]
05 Jan 2013, 21:26

The diagram given in the problem is deceiving. You assumed the line AB is perpendicular to those parallel lines, however those parallel line can have any slope. Check below diagram.

Coordinates of A & B does not help to find out the slope of parallel lines. Hence the correct answer choice is (E)

Attachment:

Parallel Lines.jpg [ 86.23 KiB | Viewed 974 times ]

Why not C? Using Point A and B, equation of line joining both points can be found, finally slope ( say m) We know that line is perpendicular with those parallel lines. (So slope of these lines will be -1/m) Using one Point A and slope (-1/m) we can derive equation Like wise, Point B can be done.

Re: What are the equations of the two parallel lines shown here? [#permalink]
14 Aug 2014, 21:43

Hello from the GMAT Club BumpBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email. _________________

Harvard asks you to write a post interview reflection (PIR) within 24 hours of your interview. Many have said that there is little you can do in this...