Let's calculate the value of \( f(4.5) \) using the given expression \( f(4.5) = 2(4.5) - 1 \).

\[
f(4.5) = 2(4.5) - 1
\]

First, multiply:

\[
2(4.5) = 9
\]

Then, subtract 1:

\[
f(4.5) = 9 - 1 = 8
\]

So, \( f(4.5) = 8 \).

Would you like any further details or have any questions?

Here are 5 related questions to expand on this concept:
1. How would you calculate \( f(2) \) using the same function rule?
2. What is the slope of the function \( f(x) = 2x - 1 \)?
3. What is the y-intercept of the function \( f(x) = 2x - 1 \)?
4. How would the graph of \( f(x) = 2x - 1 \) look like?
5. What happens to the function value as \( x \) increases?

**Tip:** Understanding the structure of linear functions can help in quickly evaluating values for different \( x \).

Learn how to calculate f(4.5) for the linear function f(x) = 2x - 1 using function notation and basic algebraic operations. This problem explores linear functions and their application in evaluating specific function values. Suitable for students in Grades 7-9.

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