The student uses correct mathematical notation, symbols, and terminology consistently throughout the Internal Assessment (IA), including accurate presentations of the Gini coefficient formula. However, key terms and variables are not defined when first introduced, which could enhance clarity for readers. The main concepts are well described in the introduction, and additional terms are defined appropriately as the exploration develops. The student effectively employs multiple forms of mathematical representation, explains all calculations clearly, states the degree of accuracy for rounded values, and rounds results only at the end of the calculations. Nevertheless, the student has not labeled graphs, tables, and diagrams correctly, as they should be titled and numbered at the bottom.
