Write the Word or Phrase That Best Completes Each Statement $$f ( x ) = e ^ { - x }$$

Write the word or phrase that best completes each statement or answers the question.
Graph the function on your calculator in order to answer the following questions:
On what intervals is the function increasing? decreasing?
Is the function odd, even, or neither?
Give the function's extrema, if any.
Find the horizontal asymptotes, if any.
How does the graph relate to a graph of one of the twelve basic functions?
- $$f ( x ) = e ^ { - x }$$