diff --git a/subjects/interpolation/README.md b/subjects/interpolation/README.md
index 48b29b74..37f4c5b3 100644
--- a/subjects/interpolation/README.md
+++ b/subjects/interpolation/README.md
@@ -21,7 +21,7 @@ duration = 10
 
    t
    |
-10 |_______________. <- execute callback([1.0, 10])
+10 |_______________. <- execute callback([0.8, 10])
    |               |
    |               |
  8 |___________.   |