Determine if this is a function.
f(x) is one over x where x is in the set minus one to one.
If we draw the graph of one over x, we will not get a value at x equals to zero.
However, in a function, each element in the domain must be sent to one element in the codomain.
Hence, since one over x is not defined at
x equal to zero,
f as defined here is not a function.