Once an antibiotic is given, number of bacteria decreases at a rate of 15%/day. There were about 15,000 bacteria prior to the treatment. The graph models the number of bacteria after x days of treatment. What are the key features of the exponential function modeled in terms of this situation and how can they be interpreted? Select each correct answer. 30 The line y = 0 is an asymptote of the graph. The x-intercept is 30. The line x = 0 is an asymptote of the graph. The asymptote indicates that there will never be more than 15,000 bacteria. The y-intercept is 15,000. The y-intercept represents the number of bacteria when treatment began. The asymptote indicates that as time increases, the number of bacteria approaches 0.​