Provide an Appropriate Response

Essay

Provide an appropriate response.
- $$\text { Does the graph of } f ( x ) = \left\{ \begin{array} { l l } 0 , & x > 0 \\5 , & x \leq 0\end{array} \text { have a vertical tangent at the point } ( 0,5 ) ? \right. \text { Give reasons for your answer. }$$