Update _episodes/02-starting-with-data.md

Author: wrightaprilm

_episodes/02-starting-with-data.md

@@ -18,7 +18,7 @@ objectives:
     - "Perform basic mathematical operations and summary statistics on data in a Pandas DataFrame."
     - "Create simple plots."
 keypoints:
-    - "Libraries enable you to add functions to Python." 
+    - "Libraries enable us to extend the functionality of Python." 
     - "Pandas is a popular library for working with data."
     - "A Dataframe is a Pandas data structure that allows one to access data by column (name or index) or row."
     - "Aggregating data using the `groupby()` function enables you to generate useful summaries of data quickly."