This reusable D3 scatter plot visualizes the insurance dataset, mapping age on the x-axis and cycling through BMI, charges, and children values on the y-axis every two seconds. It uses SVG rendering with animated transitions to swap the y-axis label and rescale the data points. The plot differentiates data points by smoker status using distinct symbols and colors from D3's `schemeCategory10` scale, and is built with reusable accessors for width, height, data, and margins.