To find $f(-2)$ for the function $f(x) = 6x + 5$, substitute $-2$ for $x$ in the equation:

$f(-2) = 6(-2) + 5$

Calculate this step-by-step:

$f(-2) = -12 + 5$

$f(-2) = -7$

So, $f(-2) = -7$.

Would you like a detailed explanation of the steps, or do you have any questions?

Here are some related questions for further exploration:

1. What is the slope of the linear function $f(x) = 6x + 5$?
2. How would you find the x-intercept of the function $f(x) = 6x + 5$?
3. What is the y-intercept of $f(x) = 6x + 5$?
4. How do you determine if a function is linear or nonlinear?
5. How would you graph the function $f(x) = 6x + 5$?

Tip: For linear functions in the form $f(x) = mx + b$, $m$ represents the slope, and $b$ is the y-intercept.