$f(4) = 4$
Work Step by Step
RECALL: $f(a)$ represents the value of the function $f$ when $x=a$. To find the value of $f(4)$, look for the point on the graph where $x=4$. Notice that the graph contains the point $(4, 4)$. Thus, $f(4) = 4$.
You can help us out by revising, improving and updating this answer.Update this answer
After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.