Answer:
y = 0
Step-by-step explanation:
This function is a "decaying exponential," which is evident because the common ratio, 0.75, is between 0 and 1.
As x increases, the graph approaches y = 0 from above, but never touches y = 0 (the x-axis). Thus, y = 0 is the horizontal asymptote. No vertical asymptote here.
