This scatter plot visualizes the relationship between engine size and fuel mileage for 30 cars from a dataset, with points colored by fuel type. The visualization uses D3 v7 with an SVG rendering approach, implementing a reusable scatter plot function that reads the CSV data manually. It uses `d3.scaleLinear` for both axes, `d3.scaleOrdinal` with `d3.schemeTableau10` for color encoding, and `d3.axisBottom` and `d3.axisLeft` for tick marks, with a legend showing fuel type categories.