diff --git a/education/math/MATH1210 (calc 1)/Derivatives.md b/education/math/MATH1210 (calc 1)/Derivatives.md
index 2660959..c3ed692 100644
--- a/education/math/MATH1210 (calc 1)/Derivatives.md	
+++ b/education/math/MATH1210 (calc 1)/Derivatives.md	
@@ -7,6 +7,11 @@ 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
+
+
 # Line Types
 ## Secant Line
-A **Secant Line** connects two points on a graph.
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+A **Secant Line** connects two points on a graph.
+
+A **Tangent Line** represents the rate of change or slope at a single point on the graph.
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