Find the Value of the Given Limit If It Exists $\infty$

Short Answer

find the value of the given limit if it exists. If the function approaches $\infty$ or $-\infty$ , say so.
- $\lim _{x \rightarrow 4^{+}} f(x)$ where $f(x)=\left\{\begin{array}{cc}2 x^{2}-7 & \text { if } x \leq 4 \\ 4-3 x & \text { if } x>4\end{array}\right.$