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100 points for $49 worth of Veritas practice GMATs FREE VERITAS PRACTICE GMAT EXAMS Earn 10 Points Per Post Earn 10 Points Per Thanks Earn 10 Points Per Upvote GMATPrep: Geometry This topic has 3 member replies GMATPrep: Geometry Hi Please share your thoughts on the method to solve the below problem... Attachments This post contains an attachment. You must be logged in to download/view this file. Please login or register as a user. Legendary Member Joined 22 Jul 2008 Posted: 683 messages Followed by: 2 members Upvotes: 73 IMO D If you want to check if the point (r,s) lies in the line y=3x+2 substitute r in place of x and s in place of y. Hence your equation will be s = 3r+2 Now see which of the options give you this equation St 1: (4r+9-s)(3r+2-s) = 0 divide both sides with (4r+9-s) you get: 3r+2-s = 0 which is the same as 3r+2 = s ---> this is the equ we have to get hence SUFF St 2: do the same thing for this st as well and you will get the equ 3r+2 = s Suff Therefore both statements alone are SUFF Wots the OA btw Junior | Next Rank: 30 Posts Joined 20 Jul 2008 Posted: 29 messages Upvotes: 1 I also chose D, but the OA is : C Legendary Member Joined 16 Aug 2008 Posted: 891 messages Followed by: 1 members Upvotes: 27 Target GMAT Score: 750) GMAT Score: 660( mals24 wrote: IMO D St 1: (4r+9-s)(3r+2-s) = 0 divide both sides with (4r+9-s) you get: 3r+2-s = 0 which is the same as 3r+2 = s ---> this is the equ we have to get hence SUFF I think this is main mistake From the main statement we should find the function that will look like s = 3r+2 (1) (4r+9-s)(3r+2-s) = 0 means that both (4r+9-s) and (3r+2-s) can be equal to zero. You should not divide by (4r+9-s) (4r+9-s)(3r+2-s) = 0 4r+9-s = 0 we get s = 4r+9 this function do not contain point (r;s) 3r+2-s = 0 we get s = 3r+2 this function contain point (r;s) INSUFF (2) (4r-6-s)(3r+2-s) = 0 4r-6-s = 0 we get s = 4r-6 this function do not contain point (r;s) 3r+2-s = 0 we get s = 3r+2 this function contain point (r;s) INSUFF (1) and (2) we have 3r+2-s = 0 we get s = 3r+2 this function contain point (r;s) Answer C • Free Veritas GMAT Class Experience Lesson 1 Live Free Available with Beat the GMAT members only code • Get 300+ Practice Questions 25 Video lessons and 6 Webinars for FREE Available with Beat the GMAT members only code • 5 Day FREE Trial Study Smarter, Not Harder Available with Beat the GMAT members only code • Award-winning private GMAT tutoring Register now and save up to$200

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