diff --git a/Notebooks/Chap06/6_1_Line_Search.ipynb b/Notebooks/Chap06/6_1_Line_Search.ipynb
index c51037b..c6efb74 100644
--- a/Notebooks/Chap06/6_1_Line_Search.ipynb
+++ b/Notebooks/Chap06/6_1_Line_Search.ipynb
@@ -4,7 +4,7 @@
   "metadata": {
     "colab": {
       "provenance": [],
-      "authorship_tag": "ABX9TyOfxeJ15PMkIi4geDTRCz3c",
+      "authorship_tag": "ABX9TyN4E9Vtuk6t2BhZ0Ajv5SW3",
       "include_colab_link": true
     },
     "kernelspec": {
@@ -131,14 +131,15 @@
         "\n",
         "        print('Iter %d, a=%3.3f, b=%3.3f, c=%3.3f, d=%3.3f'%(n_iter, a,b,c,d))\n",
         "\n",
-        "        # Rule #1 If point A is less than points B, C, and D then halve values of B, C, and D\n",
+        "        # Rule #1 If the HEIGHT at point A is less the HEIGHT at points B, C, and D then halve values of B, C, and D\n",
+        "        # i.e. bring them closer to the original point\n",
         "        # i.e. bring them closer to the original point\n",
         "        # TODO REPLACE THE BLOCK OF CODE BELOW WITH THIS RULE\n",
         "        if (0):\n",
         "          continue;\n",
         "\n",
         "\n",
-        "        # Rule #2 If point b is less than point c then\n",
+        "        # Rule #2 If the HEIGHT at point b is less than the HEIGHT at point c then\n",
         "        #                     then point d becomes point c, and\n",
         "        #                     point b becomes 1/3 between a and new d\n",
         "        #                     point c becomes 2/3 between a and new d\n",
@@ -146,7 +147,7 @@
         "        if (0):\n",
         "          continue;\n",
         "\n",
-        "        # Rule #3 If point c is less than point b then\n",
+        "        # Rule #3 If the HEIGHT at point c is less than the HEIGHT at point b then\n",
         "        #                     then point a becomes point b, and\n",
         "        #                     point b becomes 1/3 between new a and d\n",
         "        #                     point c becomes 2/3 between new a and d\n",