To find the value of $f(3)$ for the function $f(x) = 2x - 4$:

1. Substitute $x = 3$ into the function: $f(3) = 2(3) - 4$

2. Simplify the expression: $f(3) = 6 - 4 = 2$

Therefore, $f(3) = 2$.

Would you like details or have any questions?

Here are some related questions to expand your understanding:

1. What is $f(5)$ for the function $f(x) = 2x - 4$?
2. How would you find the inverse of the function $f(x) = 2x - 4$?
3. What is the slope of the function $f(x) = 2x - 4$?
4. If $f(a) = 10$, what is the value of $a$ for the function $f(x) = 2x - 4$?
5. How would you graph the function $f(x) = 2x - 4$?
6. What is the y-intercept of the function $f(x) = 2x - 4$?
7. How does the function $f(x) = 2x - 4$ change if it is transformed to $f(x) = 2x - 1$?
8. How do you determine if the function $f(x) = 2x - 4$ is increasing or decreasing?

Tip: Always check your work by substituting your answer back into the original equation to verify its accuracy.