Need algebra help with Properties of real numbers

Algebra
Tutor: None Selected Time limit: 1 Day

Dec 21st, 2015

Thank you for the opportunity to help you with your question!

the criteria is that if there is more than one y for even one value of x then it is not a function , in any other case it is . Thus 

y = 5x + 4 is a function 

x = - 8 y^2  is not a function because for negative and possitive y we get the same x (due to the square) 

y^2 =  6x + 4 is not a function because for negative and possitive y we get the same x (due to the square again) 

x = 1/4 y is a function 

Please let me know if you need any clarification. I'm always happy to answer your questions.
Dec 21st, 2015

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Dec 21st, 2015
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