From 3cf89f46b2d5d7b91caf051258d545492e3ad8bd Mon Sep 17 00:00:00 2001
From: Jake Levenson <jake77658@aol.com>
Date: Fri, 22 Mar 2019 06:15:51 -0400
Subject: [PATCH] Added initial Text describing maximum and minimum (#24539)

Included information on derivatives, and gave a link to the Derivative guide page.
---
 .../index.md                                       | 14 ++++++++++----
 1 file changed, 10 insertions(+), 4 deletions(-)

diff --git a/guide/english/mathematics/finding-the-minimum-and-maximum-of-a-function/index.md b/guide/english/mathematics/finding-the-minimum-and-maximum-of-a-function/index.md
index f5b645208e3..b908782624d 100644
--- a/guide/english/mathematics/finding-the-minimum-and-maximum-of-a-function/index.md
+++ b/guide/english/mathematics/finding-the-minimum-and-maximum-of-a-function/index.md
@@ -3,13 +3,19 @@ title: Finding the Minimum and Maximum of a Function
 ---
 ## Finding the Minimum and Maximum of a Function
 
-This is a stub. <a href='https://github.com/freecodecamp/guides/tree/master/src/pages/mathematics/finding-the-minimum-and-maximum-of-a-function/index.md' target='_blank' rel='nofollow'>Help our community expand it</a>.
 
-<a href='https://github.com/freecodecamp/guides/blob/master/README.md' target='_blank' rel='nofollow'>This quick style guide will help ensure your pull request gets accepted</a>.
+Finding the maximum or minimum of a function is an important concept in mathematics, and can be applied to many other areas of Science and Engineering for concepts such as Physics or Optimization in Statistics and Machine Learning. A function has a relative (local) maximum or minimum at any point where it's rate of change is 0.
+
+![image](https://www.themathpage.com/aCalc/calc_IMG/060.png)
+
+This is easy to see from the above example, showing a function with a local maximum and local minimum where the rate of change is 0. Formally, the rate of change of a mathematical function is called the derivative. Calculating the derivative of a function gives the instantaneous rate of change at any point in the function. 
+
+Since a local maximum or minimum is found when the rate of change is zero, to the find the maximum or minimum of a function, one simply has to calculate the derivative and set it equal to 0. 
+
+An absolute maximum or minimum is the highest or lowest point in an entire function.
 
-<!-- The article goes here, in GitHub-flavored Markdown. Feel free to add YouTube videos, images, and CodePen/JSBin embeds  -->
 
 #### More Information:
-<!-- Please add any articles you think might be helpful to read before writing the article -->
+<a href="https://github.com/freeCodeCamp/freeCodeCamp/blob/master/guide/english/mathematics/derivatives/index.md">More Information on Derivatives</a>