Ordered Pairs vs. CoordinatesDate: 9/9/96 at 10:50:13 From: O'Brien, Thomas, F Subject: Ordered Pairs vs. Coordinates Dr. Math, I was approached today by another teacher to explain to her the difference between an ordered pair and coordinates. Would you please answer this question for me? I would like to relay your reply to her. Thank you for your help, Thomas O'Brien Date: 9/9/96 at 11:25:20 From: Doctor Robert Subject: Re: Ordered Pairs vs. Coordinates An ordered pair is just a pair of numbers, usually enclosed in parentheses and separated by a comma, in which the order makes a difference. That is, (a,b) is not the same as (b,a). Now, these numbers might represent the coordinates of a point in a plane, but they also might represent ordered pairs of a function. For example (45,60000) might represent a $60000 income at age 45. Ordered pairs can represent many different things - components of vectors, for example - but coordinates, I believe, should be interpreted as representing the x-distance and the y-distance from a given origin. I hope that this helps. -Doctor Robert, The Math Forum Check out our web site! http://mathforum.org/dr.math/ |
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