This scatter plot uses the D3.js library to visualize the relationship between bill length and flipper length for penguins from the Palmer Archipelago dataset. The plot renders gray circles with reduced opacity, allowing overlapping points to remain visible. The axes are labeled “Bill Length (mm)” and “Flipper Length (mm),” and the plot includes a light gray background rectangle to delineate the inner plotting area. The code leverages D3’s `scaleLinear`, `extent`, `axisLeft`, and custom axis-label helpers to position the chart elements.