How does the value of a affect the graph of a monomial function?

A. As |a| increases, the graph widens; as |a| decreases, the graph narrows.

B. As |a| increases, the graph narrows; as |a| decreases, the graph widens.

C. As |a| increases, the graph translates to the right; as |a| decreases, the graph translates to the left.

D. As |a| increases, the graph translates up; as |a| decreases, the graph translates down.