How do you find the domain and range of #f(x)=x#?
1 Answer
The domain of
Explanation:
Given:
#f(x) = x#

The domain of
#f(x)# is the set of values for which#f(x)# is defined. In the context of Algebra I that means a subset of the real numbers#RR# . In the case of the given#f(x)# , it is well defined for any#x in RR# , so the domain is the whole of#RR# , i.e.#(oo, oo)# 
The range of
#f(x)# is the set of values that it can take for some value of#x# . Given any real number#y# , let#x = y# . Then#f(x) = x = y# . So the range of#f(x)# is the whole of#RR# too.
The graph of
# graph{x [10, 10, 5, 5]}
For every
For every