Given the function $f(x) = -x - 1$, we are asked to find $f(1)$.

To do this, substitute $x = 1$ into the function:

$f(1) = -(1) - 1 = -1 - 1 = -2$

So, $f(1) = -2$.

Would you like further details or have any questions? Here are 5 related questions to consider:

1. What is $f(-1)$ for the given function $f(x) = -x - 1$?
2. How would the graph of $f(x) = -x - 1$ look?
3. Can you find $f(0)$ using the same function?
4. What happens if you compose the function with itself, i.e., find $f(f(x))$?
5. How do you determine the inverse of the function $f(x) = -x - 1$?

Tip: When substituting values into a function, ensure to follow the correct order of operations, particularly with negative signs.