# Graphs of simple functions

CONSTANT FUNCTION: Let k be a fixed real number. Then a function f (x) given by f (x) = k for all x ϵ R is called a constant function. Sometimes we also call it the constant function k.IDENTITY FUNCTION: The function defined by I (x) = x for all x ϵ R is called the identity function on R.RECIPROCAL FUNCTION: The function that associates each non-zero real number x to its reciprocal 1/x Read more about Graphs of simple functions[…]