1. The problem asks to select appropriate representations for comparing exam scores to the number of hours of sleep the night before the exam. 2. Important to note: Exam scores and hours of sleep are two quantitative variables. 3. For comparing two quantitative variables, the best visualizations are scatter plots and tables. 4. A scatter plot shows the relationship between two numerical variables by plotting points on a coordinate plane. 5. A table can list exact values for exam scores and hours of sleep side by side for comparison. 6. Histograms and box plots are used for single-variable distributions, not for comparing two variables. 7. Dot plots are also typically for single-variable data. 8. Therefore, the appropriate representations are: - B Scatter plot - D Table Final answer: B and D are appropriate for comparing exam score to number of hours of sleep.