diff --git a/data-transform.qmd b/data-transform.qmd
index e504257..eeaa243 100644
--- a/data-transform.qmd
+++ b/data-transform.qmd
@@ -225,7 +225,7 @@ flights |>
 
 ### Exercises
 
-1.  In a singe pipeline, find all flights that meet all of the following conditions:
+1.  In a single pipeline, find all flights that meet all of the following conditions:
 
     -   Had an arrival delay of two or more hours
     -   Flew to Houston (`IAH` or `HOU`)