document.write( "Question 174846This question is from textbook
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Algebra.Com's Answer #129914 by Edwin McCravy(20086) $\"\"$ $\"About$

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Determine whether the relation {(3,2),(4,5),(-3,5),(-4,2)} is a function
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document.write( "Yes it is a function because the four first \r\n" );
document.write( "coordinates 3,4,-3, and -4 are all different.\r\n" );
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document.write( "(Note: It doesn't matter that the second \r\n" );
document.write( "coordinates 2,5,5, and 2 are not all different. \r\n" );
document.write( "Only all the first coordinates must be different\r\n" );
document.write( "in order for a relation to be a function)\r\n" );
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document.write( "The graph consists of these 4 points:\r\n" );
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document.write( "Notice that no point is directly above or\r\n" );
document.write( "below any other point.  That is how you\r\n" );
document.write( "can tell by looking at a graph whether\r\n" );
document.write( "the relation is a function.  If any point\r\n" );
document.write( "is directly above or below any other point,\r\n" );
document.write( "then the relation is not a function.\r\n" );
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document.write( "Edwin

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