This animated line chart visualizes average salaries across data science job categories, with each point displaying an interactive tooltip on hover. It aggregates the source data by job category using d3.group and d3.mean, then renders a steelblue line and circles with d3.line and scaleBand/scaleLinear scales. Mouseover transitions enlarge points and show the exact salary value, while axes are generated with d3.axisLeft and d3.axisBottom. The chart uses D3 v7.8.5, featuring a light gray background and rotated x-axis labels for readability.