This bubble chart visualizes the correlation between average horsepower, average torque, and highway MPG across different car makes, using the classic Iris dataset as a placeholder. The visualization encodes horsepower on the x-axis, torque on the y-axis, and highway MPG through both bubble size and a color scale, with each make assigned a distinct color from the interpolateTurbo palette. Built with D3 v7, the chart renders as an SVG with animated tooltips on mouseover, a legend for bubble size, and a categorical color legend, all implemented using d3.select, d3.scaleLinear, d3.scaleOrdinal, and d3.axisBottom/axisLeft.