Updated line 102 with: data['Et'].append((v_at_00004 - 15.974) * -1)

app.py

@@ -99,7 +99,7 @@ for h in step_sizes:
     error = np.abs(15.974 - v_at_00004)
     data['Step size h'].append(f'{h:.7f}')  # Formatting the step size to ensure it displays correctly
     data['v(0.00004)'].append(v_at_00004)
-    data['Et'].append(15.974 - v_at_00004)
+    data['Et'].append((v_at_00004 - 15.974) * -1)
     data['|Error| %'].append((error / 15.974) * 100)
 
 df = pd.DataFrame(data)