Identifying Square Root Functions

Quadratic equations and inequalities, variation equations, function notation, systems of equations, etc.

Identifying Square Root Functions

Postby onmyown on Fri Jul 20, 2012 11:06 pm

Hi, I understand the basic concept of a square root function. I just don't quite get how to identify them.

To be more specific,

1) is y=sqrroot of x a square root function? I'm assuming yes.

2) What about y=x^2? is this a square root function? I understand it is the inverse of y=sqrroot of x. But, would it also be considered a square root function?

In other words, is this a correct definition of square root functions?:
"When the output values (y), in each ordered pair of a relation, are the SQUARE of the input values (x). OR When the output values (y), in each ordered pair of a relation, are the SQUARE ROOT of the input values (x).

Do both statements describe a square root function in the definition?
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Postby stapel_eliz on Fri Jul 20, 2012 11:32 pm

Your question suggests an odd source for this odd confusion. Maybe your textbook is the problem, or your course lecturer...? How does your book define "square root function"? What do your class notes say?

Thank you! :wink:
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