document.write( "Question 558328: What are the domain and range of the relation {(2, 2), (4, 2), (6, 2)}? Is the relation a function? Choose yes or no.
\n" ); document.write( "Given f(x) = x2 – 2x, find f(4). \n" ); document.write( "

Algebra.Com's Answer #363031 by Edwin McCravy(20060) $\"\"$ $\"About$

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What are the domain and range of the relation {(2, 2), (4, 2), (6, 2)}? Is the
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document.write( "The set of first coordinates is {2,4,6}, that its domain\r\n" );
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document.write( "The set of second coordinates is {2}, that its range.\r\n" );
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\n" ); document.write( "relation a function? Choose yes or no.
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document.write( "The first coordinates are all different, so it's a function.\r\n" );
document.write( "(It doesn't matter that the second coordinates are not different).\r\n" );
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document.write( "-------------------------\r\n" );
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document.write( "Given f(x) = x² – 2x, find f(4).\r\n" );
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document.write( "Substitute 4 for x\r\n" );
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document.write( "      f(x) = x² – 2x\r\n" );
document.write( "      f(4) = 4² – 2·4\r\n" );
document.write( "      f(4) = 16 – 8\r\n" );
document.write( "      f(4) = 8\r\n" );
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document.write( "Edwin

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