This scatter plot displays the relationship between vehicle model year and fuel efficiency (MPG), with each circle representing a car. The visualization uses D3 v5 to load data from a CSV via `d3.csv`, then applies linear scales (`scaleLinear`) and axes (`axisBottom`, `axisLeft`) to map the values. Gridlines are rendered through tick sizing, and the SVG circles are positioned using the scaled coordinates. The chart includes labeled axes and a centered title, with styling applied via CSS.