Write an Equation of the Line Using Function Notation $( 0 , - 4 )$

Multiple Choice

Write an equation of the line using function notation.
-Horizontal; through $( 0 , - 4 )$

A) $x = - 4$
B) $x = 0$
C) $f ( x ) = 0$
D) $f ( x ) = - 4$