Final answer:
The horizontal asymptote of y = 3.10 represents that the average cost per unit will approach $3.10 as the number of units produced increases.
Step-by-step explanation:
The correct statement is: The horizontal asymptote of y = 3.10 represents that the average cost per unit will approach $3.10 as the number of units produced increases.
To understand why, we need to look at the function f(x) = [200 + 3.10x] / x. As x approaches infinity, the value of (200 + 3.10x) in the numerator will dominate the fraction, and the denominator x will have less and less effect on the outcome. This means that the average cost per unit will approach the value of 3.10. This is why the horizontal asymptote of y = 3.10 represents that the average cost per unit will approach $3.10 as the number of units produced increases.