SOLUTION: which one defines a function? 1. y=x-1 2. y^2=4-x^2 3.y=square root of x

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Question 39879: which one defines a function?
1. y=x-1 2. y^2=4-x^2 3.y=square root of x
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
1. y=x-1 2. y^2=4-x^2 3.y=square root of x
#1 is a function because for each value of "x" there
is exactly one value of "y".
Cheers,
Stan H.