diff --git a/notes/sections/7.md b/notes/sections/7.md
index ad406dc..2c6e555 100644
--- a/notes/sections/7.md
+++ b/notes/sections/7.md
@@ -2,7 +2,7 @@
 
 ## Generating random points on the plane {#sec:sampling}
 
-Two sets of 2D points $(x, y)$ --- signal and noise --- is to be generated
+Two sets of 2D points $(x, y)$ --- signal and noise --- are to be generated
 according to two bivariate Gaussian distributions with parameters:
 \begin{align*}
   \text{signal}\: