Changed math single line intro paragraph

Author: m-messer

docs/teacher/reference/response_area_components/Math_Single_Line.md

@@ -1,6 +1,6 @@
 # Math_Single_Line
 
-This response area is very similar to [Text](Text.md), differing in that it can display how the user's response was interpreted back to them through the 'live preview' feature. This works using the grading function, providing a `feedback.response_latex` field, which gets rendered.
+This response area allows users to type, write or upload mathematics, and then displays how the user's response was interpreted back to them through the 'live preview' feature. This works using the evaluation function, providing a `feedback.response_latex` field, which gets rendered.
 
 ## compareExpressions
 **Input Symbols**