To find $f(3)$ for the function $f(x) = 6x + 5$, you substitute $x = 3$ into the function:

$f(3) = 6(3) + 5$ $f(3) = 18 + 5 = 23$

Thus, $f(3) = 23$.

Would you like further details on function evaluation or any related concepts?

Here are 5 related questions you could explore:

1. What is $f(0)$ for the same function $f(x) = 6x + 5$?
2. How do you find the inverse of the function $f(x) = 6x + 5$?
3. What is the slope of the function $f(x) = 6x + 5$?
4. If $f(x) = 6x + 5$, what value of $x$ makes $f(x) = 0$?
5. How would the function change if the slope were doubled?

Tip: In linear functions like $f(x) = 6x + 5$, the number multiplying $x$ is the slope, while the constant term is the y-intercept of the graph.