This example visualizes a simple bar chart of student grades from a CSV file. It shows the relative performance of eleven students by mapping each grade value to a bar’s width. The code loads the data with `d3.csv` from the local file `votiOne.csv`, then appends SVG `<rect>` elements to a 500×500 canvas. Each rectangle’s width is set from the `Grade` field, while the `y` position and height are calculated from the data index, creating evenly spaced horizontal bars. The chart uses D3 v5’s promise-based `.then()` method to handle the asynchronous data loading.