Provide an Appropriate Response $a > 1$ Or Is $0 < a < 1$

Essay

Provide an appropriate response.
-The graph of an exponential function with base a is given. Is $a > 1$ or is $0 < a < 1$ ? Explain how you arrived at yoi answer. Give the domain and range of $f$ .
$$f ( x ) = a ^ { x }$$