document.write( "Question 393212: Provide an example of at least five ordered pairs that do not model a function. \r
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\n" ); document.write( "\n" ); document.write( "The domain will be any five integers between 0 and 20. The range will be any five integers between -10 and 10. \r
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\n" ); document.write( "\n" ); document.write( "Why does your example not model a function?
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Algebra.Com's Answer #279118 by Edwin McCravy(20060)\"\" \"About 
You can put this solution on YOUR website!
An ordered pair consists of the following things written in that order \r\n" );
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document.write( "1. A left parentheses \"(\"\r\n" );
document.write( "2. A number, called the first coordinate, or x-coordinate\r\n" );
document.write( "3. A comma\r\n" );
document.write( "4. A number, called the second coordinate, or y-coordinate\r\n" );
document.write( "5. A right parentheses \")\"\r\n" );
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document.write( "Here are some examples of ordered pairs:\r\n" );
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document.write( "(7,4), (8,8) (5,1), (7,0), (0,0) etc.\r\n" );
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document.write( "Every ordered pair starts with a \"(\" on the left end, then a number,\r\n" );
document.write( "then a comma, then another number, and finally a \")\" on the right end.\r\n" );
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document.write( "A function is a set of ordered pairs, enclosed between braces { } such that no\r\n" );
document.write( "two have the same first coordinate or x-coordinate.  It doesn't matter if two\r\n" );
document.write( "have the same second coordinate or y-coordinate.  It would still be a function\r\n" );
document.write( "as long as no two first coordinates are the same.\r\n" );
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document.write( "Here is a set of ordered pairs which model a function:\r\n" );
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document.write( "{ (7,2), (1,1), (8,1), (4,2), (3,11) }\r\n" );
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document.write( "It models a function because all of the red numbers (first coordinates) are DIFFERENT.  It doesn't matter that some of the blue numbers (second coordinates)\r\n" );
document.write( "are THE SAME.  It would still models a function whether any of the blue numbers\r\n" );
document.write( "were the same or not. \r\n" );
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document.write( "All we have to do to change that set of ordered pairs so that it DOES NOT\r\n" );
document.write( "model a function is to change one or more of the red numbers so that two will\r\n" );
document.write( "have the same first coordinates, (red number).  Like this:\r\n" );
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document.write( "{ (7,2), (1,1), (8,1), (4,2), (1,11) }\r\n" );
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document.write( "I changed the last ordered pair (3,11) to (1,11).  That keeps the\r\n" );
document.write( "set of five ordered pairs from modeling a function because it now has \r\n" );
document.write( "two ordered pairs with the same first coordinate 1.\r\n" );
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document.write( "You can made them up by the hundreds.  Just put two or more ordered pairs\r\n" );
document.write( "in it that have the same first coordinate, so that it will NOT model a function.\r\n" );
document.write( "You can tell why it doesn't model a function by telling which first coordinates\r\n" );
document.write( "are the same.\r\n" );
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document.write( "Edwin

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