wording

mattdesl · mattdesl · commit 981c628e7eb6 · 2015-06-30T13:38:44.000-04:00
diff --git a/README.md b/README.md
@@ -542,19 +542,19 @@ Although we cannot express the result of `x=1`, we *can* say that, as we approac
 
 ## prime
 
-The prime symbol (`′`) is often used in variable names to describe things which are similar, without giving it a different name altogether.
+The prime symbol (`′`) is often used in variable names to describe things which are similar, without giving it a different name altogether. Sometimes, it is used to describe the "next value" after some transformation.
 
 For example, if we take a 2D point *(x, y)* and rotate it, you might name the result *(x′, y′)*. Or, the *transpose* of matrix **M** might be named **M′**.
 
 In code, we typically just assign the variable a more descriptive name, like `transformedPosition`.
 
-For a mathematical [function](#function), the prime symbol describes the [*derivative*](#derivative) of that function. Let's take our earlier function:
+For a mathematical [function](#function), the prime symbol describes the [*derivative*](#derivative) of that function. This will be explained shortly. Let's take our earlier function:
 
 ![function2](img/function2.png)
 
 <!-- f\left (x  \right ) = x^{2} -->
 
-The derivative might be written as:
+The derivative would be written as:
 
 ![prime1](img/prime1.png)
 
@@ -634,7 +634,7 @@ From this, we can deduce that **as *dx* approaches zero margin of error, we get
 
 ![deriv3](img/deriv3.png)
 
-Thus, the *derivative* of our *x*<sup>2</sup> function can be succinctly described as below. Note the [prime](#prime) in the name. 
+Thus, the *derivative* of our *x*<sup>2</sup> function can be succinctly described as below. Note the [prime](#prime) in the name.
 
 ![prime1](img/prime1.png)
 
