Final answer:
This is a calculation to find the limit of the change in a constant function as the input's change approaches zero, which results in a derivative of 0.
Step-by-step explanation:
The question appears to be about calculating the limit of the change in a function as the change in the input approaches zero. Specifically, it looks like a question involving the derivative of a function. Given that f(x) is a constant function, as indicated by the horizontal line graph between 0 and 20, the derivative will be 0. Thus, finding the limit as δx approaches zero for the expression f(x + δx) - f(x) over δx would result in 0, since there is no change in the value of f(x) as x changes.