Update app.py

app.py

@@ -65,6 +65,9 @@ def plot_nonmarket_wtp():
     ax.set_title("Non-Market WTP: Fish Diversity")
     ax.set_xlabel("Quality Level")
     ax.set_ylabel("WTP ($)")
+    # Force axes to start at zero
+    ax.set_xlim(left=0)
+    ax.set_ylim(bottom=0)
     ax.legend()
     plt.tight_layout()
     return fig