This scatter plot maps student age against mark and attendance for the GAV department, with each point representing an individual course record from the provided CSV data. The visualization uses D3 v5 with SVG rendering, employing `scaleLinear` for the x-axis (Age) and `scaleBand` for the y-axis (Mark), while attendance values are encoded but not directly shown in the current rendering. The chart displays axes via `axisLeft` and `axisBottom`, with rectangular bars sized by age and positioned by mark. Data preprocessing converts age, attendance, and mark strings to numbers before rendering.