<PRE><B>Question 119878</B>
I need your help. I am not the greatest when it comes to solving functions. 
x^2=1+y^2....is this a function or not 
is this correct? 
x^2-y^2=1
This is a hyperbola opening right and left.
It is not a function because an x value has more than one corresponding 
y value.
y = [sqrt(x^2-1)] or y = -[sqrt(x^2-1)]
domain [1,infin) or (-inf,-1]
range: All Real Numbers
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Cheers,
stan H.</PRE>