Final answer:
The function f(x)=20 represents a horizontal line for 0 ≤ x ≤ 20. Therefore, evaluating f(x) when x=5, gives f(5)=20, as f(x) is constant within the given domain.
Step-by-step explanation:
To create a function that represents the data provided, we need to observe the nature of the graph described. The graph of f(x) = 20 for the domain 0 ≤ x ≤ 20 is a horizontal line at the y-coordinate of 20. Because f(x) is a constant function within this range, the value of f(x) will always be 20 regardless of the x-value, as long as x is within the specified domain.
To evaluate the function f(x) at x=5, we simply substitute x with 5 in the function f(x)=20. Since it is a horizontal line, the value of f(5) is also 20.