X Intercept?

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Bullzi: Senior | Next Rank: 100 Posts; Posts: 62; Joined: Thu May 28, 2015 1:13 am; Thanked: 5 times

by Bullzi » Mon Sep 28, 2015 5:11 am

Hello..

I wanted to check with you if in Coordinate Geometry, the words X Intercept always refer to the point where a line intersects the x-axis. I don't remember the exact question, however, I think I encountered a question somewhere where the phrase X Intercept was used to refer to a random point on the xy plane and not the point of intersection with the x-axis. Is this usage valid or is my memory playing games with me!?

Thanks
Bullzi

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Source: Beat The GMAT — Problem Solving | Mon Sep 28, 2015 5:11 am

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Brent@GMATPrepNow: GMAT Instructor; Posts: 16207; Joined: Mon Dec 08, 2008 6:26 pmFollowed by: 1268 members; Location: Vancouver, BC; Thanked: 5254 times; GMAT Score:770

by Brent@GMATPrepNow » Mon Sep 28, 2015 9:03 am

Hi Bullzi,

Your mind may be playing tricks

The x-intercept refers to the point where a line/curve crosses the x-axis.

Here are a couple of questions that involve x- and y-intercepts:
- https://www.beatthegmat.com/tricky-ds-t278443.html
- https://www.beatthegmat.com/lines-n-and- ... 39454.html

Cheers,
Brent

Brent Hanneson - Creator of GMATPrepNow.com

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[email protected]: Elite Legendary Member; Posts: 10392; Joined: Sun Jun 23, 2013 6:38 pmFollowed by: 511 members; Location: Palo Alto, CA; Thanked: 2867 times; GMAT Score:800

by [email protected] » Mon Sep 28, 2015 9:33 am

Hi Bullzi,

The 'X-intercept' is the point at which the graph crosses the X-axis. The 'X-co-ordinate' is the first number in a pair of numbers (and each pair can be graphed at a particular point in the XY plane).

X-intercepts ALWAYS have a Y-co-ordinate of 0.

(2,0), (0,0) and (-7,0) are all examples of X-intercepts.

The X-co-ordinate in those 3 examples is 2, 0 and -7 respectively.

GMAT assassins aren't born, they're made,
Rich

Contact Rich at [email protected]

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Bullzi: Senior | Next Rank: 100 Posts; Posts: 62; Joined: Thu May 28, 2015 1:13 am; Thanked: 5 times

by Bullzi » Mon Sep 28, 2015 9:33 am

Thanks Brent..
My mind is at it again!

Thanks
Bullzi

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Bullzi: Senior | Next Rank: 100 Posts; Posts: 62; Joined: Thu May 28, 2015 1:13 am; Thanked: 5 times

by Bullzi » Mon Sep 28, 2015 9:38 am

Thanks Rich, that was helpful

Thanks
Bullzi

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