diff --git a/education/math/MATH1210 (calc 1)/Derivatives.md b/education/math/MATH1210 (calc 1)/Derivatives.md
index c3ed692..8759472 100644
--- a/education/math/MATH1210 (calc 1)/Derivatives.md	
+++ b/education/math/MATH1210 (calc 1)/Derivatives.md	
@@ -7,9 +7,10 @@ Interpreting it, this can be described as the change in $y$ over the change in $
 - Speed is always positive
 - Velocity is directional
 
-As the distance between the two points
-
+As the distance between the two points $a$ and $b$ grow smaller, we get closer and closer to the instantaneous velocity of a point. Limits are suited to describing the behavior of a function as it approaches a point.
 
+If we have the coordinate pair $(a, f(a))$, and the value $h$ is the distance between $a$ and another $x$ value, the coordinates of that point can be described as ($(a + h, f(a + h))$. With this info:
+- The slope of the secant line can be described as $
 # Line Types
 ## Secant Line
 A **Secant Line** connects two points on a graph.