document.write( "Question 222440: Determine whether each relation is a function. In addition, provide reasons for identifying a relation as a function.
\n" ); document.write( "1. {(3, 4), (5, 9), (9, 9), (2, 3)}
\n" ); document.write( "2. {(0, 0), (0, 1), (1, 4), (2, 4)}
\n" ); document.write( "3. {(2, 1), (4, 5), (8, 4), (1, 0)}
\n" ); document.write( "4. {(8, 3), (8, 0), (7, 7), (4, 7)}
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Algebra.Com's Answer #166536 by vleith(2983) $\"\"$ $\"About$

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1 and 3 are functions.
\n" ); document.write( "2 and 4 are not functions since in both of those, a value for x (0 in number 2 and 8 in number 4), map to more than one value for y \n" ); document.write( "

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