This visualization displays the trend of average electric vehicle range per year from 2015 to 2020, using a line chart with red circular markers at each data point. The chart aggregates raw yearly range values into yearly averages using `d3.rollup` with `d3.mean`, then renders the line with `d3.line` and SVG paths. Axes are generated via `d3.axisBottom` and `d3.axisLeft`, with the x-axis formatted as integers to reflect calendar years. The visualization uses D3 v7 with an SVG rendering approach, presenting clear upward growth in average EV range over the six-year period.