Adjust y-axis tick format and title in visualizations

app.py

@@ -198,7 +198,12 @@ def create_visualizations():
     )
     fig_investment_agent.update_layout(
         xaxis_title=None,
-        yaxis=dict(tickmode='linear', tick0=0, dtick=1),
+        yaxis=dict(
+            title="Investment Amount (USD)",
+            tickmode='auto',
+            nticks=10,
+            tickformat='.2f'  # Show 2 decimal places
+        ),
         xaxis=dict(
             tickmode='array',
             tickvals=investment_per_agent['date'],