Write an Equation for the Piecewise Function $f ( x ) = \left\{ \begin{array} { l l } 4 , & \text { for } x < 0 , \\- x , & \text { for } x \geq 0\end{array} \right.$

Multiple Choice

Write an equation for the piecewise function.
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A) $f ( x ) = \left\{ \begin{array} { l l } 4 , & \text { for } x < 0 , \\- x , & \text { for } x \geq 0\end{array} \right.$
B) $f ( x ) = \left\{ \begin{array} { l l } 4 , & \text { for } x \leq 0 \\- x , & \text { for } x > 0\end{array} \right.$
C) $f ( x ) = \left\{ \begin{array} { l l } 4 , & \text { for } x < 0 \\- 4 x , & \text { for } x \geq 0\end{array} \right.$
D) $f ( x ) = \left\{ \begin{array} { l l } 4 , & \text { for } x < 0 \\x , & \text { for } x \geq 0\end{array} \right.$