explain iso-revenue lines

longye-tian · longye-tian · commit ca330c7ac089 · 2024-07-23T19:21:53.000+10:00
diff --git a/lectures/lp_intro.md b/lectures/lp_intro.md
@@ -91,6 +91,8 @@ $$
 
 The following graph illustrates the firm's constraints and iso-revenue lines.
 
+Iso-revenue lines show all the combinations of materials and labor producing the same revenue.
+
 ```{code-cell} ipython3
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 tags: [hide-input]
