diff --git a/data-visualize.Rmd b/data-visualize.Rmd
index dd20078..0c0dd54 100644
--- a/data-visualize.Rmd
+++ b/data-visualize.Rmd
@@ -771,7 +771,7 @@ ggplot(data = mpg) +
   geom_point(mapping = aes(x = displ, y = hwy))
 ```
 
-The values of `hwy` and `displ` are rounded so the points appear on a grid and many points overlap each other.
+The underlying values of `hwy` and `displ` are rounded so the points appear on a grid and many points overlap each other.
 This problem is known as **overplotting**.
 This arrangement makes it hard to see where the mass of the data is.
 Are the data points spread equally throughout the graph, or is there one special combination of `hwy` and `displ` that contains 109 values?