document.write( "Question 74232This question is from textbook Algebra
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Algebra.Com's Answer #53243 by rmromero(383)\"\" \"About 
You can put this solution on YOUR website!
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document.write( "Domain of a relation is the set of all its first element or x - coordintes.\r
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document.write( "Range of a relation is the set of all its second element or y-coordinates.\r
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document.write( "example \r
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document.write( "          x       y
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document.write( "         -1       0
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document.write( "          0      1.5
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document.write( "          1       3\r
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document.write( "Domain: {-1, 0, 1}
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document.write( "Range: {0, 1.5, 3}\r
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document.write( "Function is a relation in which each element of the domain is paired with 
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document.write( "EXACTLY one element of the range.\r
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document.write( "        example\r
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document.write( "           x      y
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document.write( "           0     -1
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document.write( "           2     -2 
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document.write( "           1     -1
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document.write( "           1      5 
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document.write( "          -3      4\r
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document.write( "This is not a function because the domain 1 is paired with two ranges -1 and 5.\r
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document.write( "A function should be\r
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document.write( "          x      y
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document.write( "          1      7
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document.write( "          2      7
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document.write( "          3      8\r
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document.write( "even if two domain has one element of y. 
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document.write( "domain is paired with exactly one range \n" );
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