What function type has f(8) = -23 and f^(-1)(-25) = 3?

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f(8) = -23 and f^(-1)(-25) = 3

what is this functions called??
 
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What is the functions called? I'm not sure I understand your question. The first function is called f, and the second function is called the inverse of f.

There are infinitely many functions that satisfy the conditions f(8) = -23 and f^(-1)(-25) = 3, so there is no special name for such functions.
 


so, the question states that

the inverse of f (-23)= ?

What's the question tells me to find anyway??
 


About this, i finally found a webpage that would allowed me to understand inverse function. thanks anyway.
 


Yes, if f(a)= b, then f-1[b)= a, by the definition of "inverse". If f(8)= -23, then f-1(-23)= 8.