document.write( "Question 592852: why isn't (1,3) (2,2) (1,5) (2,6) a function \n" ); document.write( "

Algebra.Com's Answer #376105 by jim_thompson5910(35256) $\"\"$ $\"About$

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Because the x value of x = 1 maps to both y = 3 and y = 5 at the same time. You can't have an input map to two different outputs in order to have a function. \n" ); document.write( "

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