A bar chart visualizes the average math scores of students, grouped by their academic department. The chart uses steelblue bars that change to orange on hover, with a y-axis displaying the average score and an x-axis listing the departments. Constructed with the D3.js library, the visualization loads data from a local CSV file, processes it to compute group means, and renders the SVG using d3.scaleBand for the categorical axis and d3.scaleLinear for the numerical axis.