evaluate the fuction when x= 8: b (x) = 7x - 4

To evaluate the function \( b(x) = 7x - 4 \) when \( x = 8 \), substitute 8 for \( x \) in the equation:

\[
b(8) = 7(8) - 4
\]

Now calculate:

\[
b(8) = 56 - 4 = 52
\]

Thus, \( b(8) = 52 \).

Would you like further details or have any questions?

Here are 5 related questions you might find useful:

1. What is the value of \( b(x) \) when \( x = -3 \)?
2. How does the function change if the coefficient of \( x \) is increased?
3. What is the slope of the function \( b(x) = 7x - 4 \)?
4. Can you rewrite the function as \( b(x) = mx + c \), and identify \( m \) and \( c \)?
5. How would you graph the function \( b(x) \)?

**Tip:** When evaluating functions, always remember to carefully substitute values and simplify step-by-step for accuracy.

Evaluate the function when x = 8: b(x) = 7x - 4

Learn how to evaluate the linear function b(x) = 7x - 4 when x = 8. This problem demonstrates the use of substitution in linear functions, a key concept in algebra. Suitable for students in Grades 6-8.

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