From 90e4ddb40f8c140090964d86671bd4febfcfad6b Mon Sep 17 00:00:00 2001
From: Ty Mick <ty@tymick.me>
Date: Thu, 16 Jul 2020 14:35:03 -0400
Subject: [PATCH] Add <dfn> tags (#39260)

---
 .../set-a-domain-and-a-range-on-a-scale.english.md            | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/set-a-domain-and-a-range-on-a-scale.english.md b/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/set-a-domain-and-a-range-on-a-scale.english.md
index a3b7f65c9b..fdb91bc9a6 100644
--- a/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/set-a-domain-and-a-range-on-a-scale.english.md
+++ b/curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/set-a-domain-and-a-range-on-a-scale.english.md
@@ -9,8 +9,8 @@ forumTopicId: 301491
 ## Description
 <section id='description'>
 By default, scales use the identity relationship - the input value maps to the output value. But scales can be much more flexible and interesting.
-Say a data set has values ranging from 50 to 480. This is the input information for a scale, and is also known as the domain.
-You want to map those points along the <code>x</code> axis on the SVG canvas, between 10 units and 500 units. This is the output information, which is also known as the range.
+Say a data set has values ranging from 50 to 480. This is the input information for a scale, also known as the <dfn>domain</dfn>.
+You want to map those points along the <code>x</code> axis on the SVG canvas, between 10 units and 500 units. This is the output information, also known as the <dfn>range</dfn>.
 The <code>domain()</code> and <code>range()</code> methods set these values for the scale. Both methods take an array of at least two elements as an argument. Here's an example:
 
 ```js