Fix typo, closes hadley#1535

Author: mine-cetinkaya-rundel

EDA.qmd

@@ -710,6 +710,6 @@ We're not discussing modelling in this book because understanding what models ar
 
 In this chapter you've learned a variety of tools to help you understand the variation within your data.
 You've seen techniques that work with a single variable at a time and with a pair of variables.
-This might seem painfully restrictive if you have tens or hundreds of variables in your data, but they're foundation upon which all other techniques are built.
+This might seem painfully restrictive if you have tens or hundreds of variables in your data, but they're the foundation upon which all other techniques are built.
 
 In the next chapter, we'll focus on the tools we can use to communicate our results.