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The function given is \( f(x) = -2x - 5 \). You are asked to find \( f(-1) \).

To do this, substitute \( x = -1 \) into the function:

\[
f(-1) = -2(-1) - 5
\]

Simplifying this:

\[
f(-1) = 2 - 5 = -3
\]

So, \( f(-1) = -3 \).

Would you like further details or have any other questions?

Here are 5 related questions to explore:

1. What is the general form of a linear function?
2. How would you find \( f(2) \) for the same function?
3. How do you interpret the slope and intercept in the function \( f(x) = -2x - 5 \)?
4. How can you graph \( f(x) = -2x - 5 \)?
5. What happens if \( f(x) = 0 \)? How do you solve for \( x \)?

**Tip**: When evaluating a function, always ensure you're correctly substituting the input value into the expression and simplifying properly!

Learn how to evaluate the linear function f(x) = -2x - 5 by substituting x = -1. This problem is ideal for middle school students (Grades 6-8) and covers key algebraic concepts such as substitution and function evaluation.

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