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.

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.