diff --git a/05_pet_breeds.ipynb b/05_pet_breeds.ipynb
index ce632ef..665943d 100644
--- a/05_pet_breeds.ipynb
+++ b/05_pet_breeds.ipynb
@@ -1254,7 +1254,7 @@
     "Does \"logarithm\" ring a bell? The logarithm function has this identity:\n",
     "\n",
     "```\n",
-    "y = a**b\n",
+    "y = b**a\n",
     "a = log(y,b)\n",
     "```\n",
     "\n",