Co-ordinate geometry

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GmatKiss: Legendary Member; Posts: 2789; Joined: Tue Jul 26, 2011 12:19 amFollowed by: 43 members; Location: Chennai, India; Thanked: 206 times; GMAT Score:640

by GmatKiss » Mon Oct 10, 2011 6:10 am

Is the answer 15 ?

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Source: Beat The GMAT — Problem Solving | Mon Oct 10, 2011 6:10 am

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Anurag@Gurome: GMAT Instructor; Posts: 3835; Joined: Fri Apr 02, 2010 10:00 pmFollowed by: 523 members; Location: Milpitas, CA; Thanked: 1854 times; GMAT Score:770

by Anurag@Gurome » Mon Oct 10, 2011 6:22 am

(-2, k) is a point on the graph y = 2xÂ² - 3x + 1

Thus, for x = -2, y = k
Hence, k = 2*(-2)Â² - 3*(-2) + 1 = 8 + 6 + 1 = 15

The correct answer is E.

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saketk: Legendary Member; Posts: 608; Joined: Sun Jun 19, 2011 11:16 amFollowed by: 8 members; Thanked: 37 times

by saketk » Tue Oct 11, 2011 8:09 am

GmatKiss wrote:Is the answer 15 ?

Yes

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