This interactive bubble chart visualizes the correlation between average horsepower, torque, and highway MPG across 31 car makes, with data sourced from `bubblechart.csv`. Each circle's x-axis position encodes horsepower, the y-axis encodes torque, and the circle's radius represents highway MPG via a linear scale (`d3.scaleLinear`), while a categorical color scale (`d3.scaleOrdinal` with `interpolateTurbo`) distinguishes makes. Rendered as SVG with D3 v7, the visualization includes hover tooltips showing the make, a legend for MPG bubble sizes, and color-coded entries for each make. The chart animates tooltip opacity using D3 transitions and uses axes from `d3.axisBottom` and `d3.axisLeft`.