Write the Word or Phrase That Best Completes Each Statement $N(x)$

Essay

Write the word or phrase that best completes each statement or answers the question
-Suppose that during a flu epidemic in a particular city, the number of people, $N(x)$ , infected (in thousands) at the end of $x$ weeks is approximated by
$$N(x)=\frac{104 x}{x+21}$$
What is the horizontal asymptote of the graph of this function? What does this suggest about the maximum number of people who will eventually be infected? Explain your reasoning.