This visualization uses a scatter plot to explore the relationship between fuel efficiency (mpg) and horsepower across vehicles, with color indicating origin and point size encoding weight. Built with the vega-lite-api library and rendered using vega-lite and vega, the plot loads data from the UCI Auto MPG dataset via d3.csv. A tooltip from vega-tooltip displays each car’s name on hover. The visualization fits the entire browser window, and axis labels are styled with a custom configuration for improved readability.