This line graph visualizes car registrations in Austin, Texas from 2012 to 2021, using fiscal year on the x-axis and number of cars registered on the y-axis. The chart layers a blue line with circles at each data point, and adds interactive features through vega-lite API selection and hover events, displaying rule-based crosshairs and value labels. The visualization uses d3.v5 for CSV data loading from a GitHub-hosted Austin car registration dataset, with Vega and Vega-Lite handling rendering and tooltips. Custom color and font styling are applied through a config file.