document.write( "Question 141879This question is from textbook Algebra 2
\n" ); document.write( ": I know that there is only one output for each input, but why? \n" ); document.write( "
Algebra.Com's Answer #106527 by nabla(475)\"\" \"About 
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I don't have this text available to me, however, I suspect I know what they are asking. Note that most tutors here will not have the text available to them.\r
\n" ); document.write( "\n" ); document.write( "In a function, we essentially are taking some value for one variable to produce another. There is no possible way in the x-y coordinate system for a function f(x)=(anything involving x)to produce two function values. Moreover, for any number there is only one possible outcome for an expression.\r
\n" ); document.write( "\n" ); document.write( "Consider:
\n" ); document.write( "f(x)=1/x\r
\n" ); document.write( "\n" ); document.write( "f(1)=1 always
\n" ); document.write( "f(2)=1/2 always
\n" ); document.write( "f(3)=1/3 always
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\n" ); document.write( "etc.\r
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