How do you use a bell curve to explain what kind of selection is antibiotic resistant?

A bell curve represents the distribution of traits in a population, with most individuals clustering around the average and fewer at the extremes. In the context of antibiotic resistance, the curve may shift to the right if a mutation confers resistance, allowing resistant bacteria to survive and reproduce more effectively under antibiotic pressure. This represents directional selection, where the average trait (sensitivity to antibiotics) decreases over time, as resistant variants become more prevalent. Consequently, the population adapts to the antibiotic environment, leading to an increase in resistance.