Answer: To find f(4), we can substitute the value of x into the given function f(x) = 2x - 8. So, we have:
f(4) = 2(4) - 8
Now, let's simplify the expression:
f(4) = 8 - 8
When we subtract 8 from 8, the result is 0. Therefore, f(4) is equal to 0.
I hope this helps!