To evaluate the function $f(x) = 8x + 1$ at $x = -2$, we substitute $-2$ for $x$ in the function.

$f(-2) = 8(-2) + 1$ $f(-2) = -16 + 1$ $f(-2) = -15$

So, $f(-2) = -15$.

Would you like further details or have any questions?

Here are 5 related questions to further explore the topic:

1. How would you evaluate $f(3)$ for the same function $f(x) = 8x + 1$?
2. If $f(x) = 8x + 1$, what is $f(0)$?
3. How do you find the slope of a linear function like $f(x) = 8x + 1$?
4. What happens to the function $f(x) = 8x + 1$ if $x$ is a fraction?
5. How would you determine the x-intercept of $f(x) = 8x + 1$?

Tip: When evaluating functions, always substitute the given value for the variable and simplify step by step.