Reciprocal Function
This is the Reciprocal Function:
f(x) = 1/x
This is its graph:
f(x) = 1/x
It is a Hyperbola
It is an odd function
Its Domain is the Real Numbers, except 0, because 1/0 is undefined.
Using set-builder notation:
Its Domain is {x 
| x ≠ 0}
Its Range is also {x | x ≠ 0}
As an Exponent
The Reciprocal Function can also be written as an exponent :
f(x) = x-1
(it means the same thing)
Plot the graph here