To find the value of the function $f(x) = 3x - 5$ when $x = 0$, substitute $x = 0$ into the function:

$f(0) = 3(0) - 5$

Simplifying this:

$f(0) = 0 - 5 = -5$

So, $f(0) = -5$.

Would you like more details or have any questions?

Here are some related questions you might find helpful:

1. How do you find the value of a function for different values of $x$?
2. What is the slope and y-intercept of the linear function $f(x) = 3x - 5$?
3. How do you graph the function $f(x) = 3x - 5$?
4. How do you solve $f(x) = 0$ for $x$ in the function $f(x) = 3x - 5$?
5. How does changing the slope or y-intercept affect the graph of a linear function?

Tip: Always substitute carefully into a function and simplify step by step to avoid errors.