This example visualizes five automobile performance attributes—economy in miles per gallon, cylinder count, horsepower, weight, and 0-to-60 mph time—as a set of colored polylines plotted against car models from a CSV file. The chart reveals each model’s relative values across these disparate scales on a single axis. The code uses D3 v7 to load the CSV, define point and linear scales, draw the SVG paths with `d3.line`, and render axes with `d3.axisBottom` and `d3.axisLeft`. Each attribute uses a fixed stroke color, and a legend is constructed via `d3.scaleOrdinal`.