Answer
$$\lim_{x \to 10}f(x)=20$$
Work Step by Step
To find $\lim_{x\to 10}f(x)$, examine the graph of $f$ near $x=10$. As $x$ gets closer to $10$, the values of $f(x)$ get closer to $20$. We conclude from the graph that$$\lim_{x \to 10}f(x)=20.$$
