range of a function
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find the range
The question is:Indicate the domain and range for this: y = sqr(x-9) (Square root of)
The answer for the domain is x>=9 which is not surprisingly, but the range is y>=0, yER ... which I could understand if you were not allowed to transform the equation into x as the subject..
But all example on the facing page DO TRANSFORM the equation at will with x and/or y as the subject..
Can you explain this...??