Consider the following.

$f(x)=\{\begin{array}{cc}x+6,& x0\\ 3x+4,& x>0\end{array}$

Approximate $\underset{x0}{lim}f(x)$ numerically and verify your answer graphically. $($If the limit is infinite, enter $\text{'}{}^{\text{'}}$ or $\text{'}-{}^{\text{'}},$ as appropriate. If the limit does not otherwise exist, enter DNE.$)$

Use the graph of $f(x)$ below to estimate $\underset{x}{lim}f(x).$ If a limit does not exist because the function has infinite behavior, use limit notation to describe the infinite behavior.

$\underset{x}{lim}f(x)=$

$\underset{x}{lim}f(x)=1$

$\underset{x}{lim}f(x)=-$

$\underset{x}{lim}f(x)$ does not exist but we can best describe the behavior as $\underset{x}{lim}f(x)longrightarrow-.$

$\underset{x}{lim}f(x)=0$

$\underset{x}{lim}f(x)$ does not exist but we can best describe the behavior as $\underset{x}{lim}f(x)longrightarrow.$