We are given the function $f(x) = -x + 1$, and we are asked to find $f(-1)$.

Step-by-step process:

1. Substitute $x = -1$ into the function $f(x) = -x + 1$:

   $f(-1) = -(-1) + 1$

2. Simplify:

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

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

Final Answer:

$f(-1) = 2$

Would you like further details on this solution or have any questions?

Here are 5 related questions to expand this topic:

1. What is $f(0)$ for the function $f(x) = -x + 1$?
2. How would you find the inverse function of $f(x) = -x + 1$?
3. What is $f(2)$ for the same function?
4. How would you find the domain and range of $f(x) = -x + 1$?
5. If the function was $f(x) = 2x + 1$, what would $f(-1)$ be?

Tip: Always start by substituting the given value into the function before simplifying.