This example visualizes the Penguin dataset using a scatter plot that maps two numerical variables onto x- and y-axes. It leverages D3's `scaleLinear`, `extent`, and axis functions to create scales and render axes. The code draws a background rectangle, then places circles with fixed radius and opacity, using the `xValue` and `yValue` accessors to position each point. The plot includes axis labels via the `@curran/axis-labels` helper, making the data relationships clear.