Question 687904: what is the domain and range of f(x)=x^2-1. and how do i find ranges in general?
Answer by MathLover1(20850)   (Show Source):
You can put this solution on YOUR website! how to find domain and range in general:
( ,  ), ( ,  ), ( ,  ), (, ), (, )}
The above list of points, being a relationship between certain x's and certain y's, is a relation.
The  is all the  , and the  is all the  . To give the domain and the range, I just list the values without duplication:
domain: {., , , .}
range: {., , , .}
the domain and range of 
let' se the graph:
as you can see, can take any real number for  and
domain:   
or ( ,  )
range: for 
or (, )
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