Update visualization.py

visualization.py

@@ -52,8 +52,8 @@ class Visualization:
             height = bar.get_height()
             ax.text(bar.get_x() + bar.get_width() / 2, height, f'{height:.0f}%', ha='center', va='bottom', color='black')
 
-        ax.axhline(y=90, color='#005288', linestyle='.', linewidth=1.5, label=f'Attendance Threshold: ≥ 90%')
-        ax.axhline(y=80, color='#3AB0FF', linestyle='.', linewidth=1.5, label=f'Engagement Threshold: ≥ 80%')
+        ax.axhline(y=90, color='#005288', linestyle=':', linewidth=1.5, label=f'Attendance Threshold: ≥ 90%')
+        ax.axhline(y=80, color='#3AB0FF', linestyle=':', linewidth=1.5, label=f'Engagement Threshold: ≥ 80%')
         ax.axhline(y=attendance_avg_stats, color='#005288', linestyle='--', linewidth=1.5, label=f'Attendance Average: {attendance_avg_stats}%')
         ax.axhline(y=engagement_avg_stats, color='#3AB0FF', linestyle='--', linewidth=1.5, label=f'Engagement Average: {engagement_avg_stats}%')