Evaluate the function below at x=9 Put your answer in function notation .f(x) =-8x-4

To evaluate the function \( f(x) = -8x - 4 \) at \( x = 9 \), substitute \( 9 \) for \( x \) in the function:

\[
f(9) = -8(9) - 4
\]

\[
f(9) = -72 - 4
\]

\[
f(9) = -76
\]

So, the answer in function notation is \( f(9) = -76 \).

Would you like more details on this process or have any questions?

Here are 5 related questions:
1. What is \( f(-2) \) for the function \( f(x) = -8x - 4 \)?
2. If \( f(x) = -8x - 4 \), what is \( x \) when \( f(x) = 0 \)?
3. How does the function \( f(x) = -8x - 4 \) affect the slope and intercept of the line compared to \( y = x \)?
4. What is the y-intercept of the function \( f(x) = -8x - 4 \)?
5. How would you graph the function \( f(x) = -8x - 4 \) on a coordinate plane?

**Tip:** Always simplify step by step when evaluating functions to avoid errors.

Learn how to evaluate the function f(x) = -8x - 4 at x = 9 with a detailed step-by-step solution. This problem involves substituting x = 9 into the function and simplifying to find the function value. Suitable for high school students studying linear functions.

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