This scatter plot visualizes cardiovascular health data from a heart disease CSV, plotting each patient’s weight against their age as horizontal bars. The visualization uses D3 v5 with `d3.scaleLinear` for the x-axis and `d3.scaleBand` for the y-axis, rendering SVG rectangles. Data is loaded via `d3.csv` from the `heart_disease_data.csv` file, with each bar’s width proportional to weight and height set by band width. The example is a fork of an original cars scatter plot, adapted to this medical dataset.