document.write( "Question 182475: Is the following equation a function?\r
\n" ); document.write( "\n" ); document.write( "y=x^2-9\r
\n" ); document.write( "\n" ); document.write( "Thank you in advance for any help you could give me! I am not grasping the concept of functions AT ALL and it is very frustrating!! thanks again!
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Algebra.Com's Answer #136943 by Alan3354(69443)\"\" \"About 
You can put this solution on YOUR website!
It is. y is expressed in terms of x, or y is a function of x. \n" ); document.write( "
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