Final answer:
The given function f(x) is a horizontal line restricted to the portion between x = 0 and x = 20, inclusive.
Step-by-step explanation:
The given information states that we have a function f(x) for 0 ≤ x ≤ 20. The graph of f(x) is a horizontal line. However, since 0 ≤ x ≤ 20, f(x) is restricted to the portion between x = 0 and x = 20, inclusive.
The list of knowns includes:
- Function f(x) is a horizontal line.
- 0 ≤ x ≤ 20
To solve for the unknowns, we need additional information or an equation to work with. Since the question does not provide any additional information or specify the quantity to be determined, we cannot solve for any specific unknown.