Find the range of the following functions.
a) F(x) is one over x where x is not equals to zero.
First, we know that the domain is real numbers excluding the number zero.
Referring to the graph, for this value of the domain,
the range of the function is also real numbers excluding zero as the function is not valid when y is equal to zero.
b) F(x) is x squared minus 3, where x is a real number.
Hence, the domain is the real number. The graph of the function has a minimum point at y equals to minus 3.
Referring to the graph, for this value of the domain, the range of the function is from its minimum point minus three to positive infinity.