This scatter plot visualizes the relationship between horsepower and miles per gallon (MPG) for cars from the UCI Auto MPG dataset. Each point represents a vehicle, with steelblue semi-transparent circles plotted on axes with gridlines. The visualization is built with D3 v7, using `scaleLinear` for scaling, `axisLeft` and `axisBottom` for axis generation, and a data join to render circles from CSV data. The chart includes axis labels and a title, with styling applied via CSS.