Final answer:
The relation R is not reflexive in this case.
Step-by-step explanation:
The relation R is not reflexive in this case. A relation is reflexive if (f, f) is in R for all functions f in the set S. In this case, for R to be reflexive, we would need f(x) to be O(f(x)). However, this is not always true for all continuous functions f(x). There exist continuous functions where f(x) is not O(f(x)). Therefore, R is not reflexive.