diff --git a/01.fit_a_line/README.md b/01.fit_a_line/README.md
index 407d0411eb7a2f3cd990618a22b34eaca0abfd28..ff8a45af31fb2c8809f11ce2fe005a4ee8dec0b3 100644
--- a/01.fit_a_line/README.md
+++ b/01.fit_a_line/README.md
@@ -63,7 +63,7 @@ The UCI housing dataset has 506 instances. Each instance describes the attribute
 | AGE | proportion of owner-occupied units built prior to 1940 | Continuous |
 | DIS | weighted distances to five Boston employment centres | Continuous |
 | RAD | index of accessibility to radial highways | Continuous |
-| TAX | full-value property-tax rate per $10,000 | Continuous |
+| TAX | full-value property-tax rate per \$10,000 | Continuous |
 | PTRATIO | pupil-teacher ratio by town | Continuous |
 | B | 1000(Bk - 0.63)^2 where Bk is the proportion of blacks by town | Continuous |
 | LSTAT | % lower status of the population | Continuous |
diff --git a/01.fit_a_line/index.html b/01.fit_a_line/index.html
index 4c6cf7f431c599abdae0f6e4109ca571ba613f4d..356780cb8295cd8367adf51df000eee1893140e2 100644
--- a/01.fit_a_line/index.html
+++ b/01.fit_a_line/index.html
@@ -105,7 +105,7 @@ The UCI housing dataset has 506 instances. Each instance describes the attribute
 | AGE | proportion of owner-occupied units built prior to 1940 | Continuous |
 | DIS | weighted distances to five Boston employment centres | Continuous |
 | RAD | index of accessibility to radial highways | Continuous |
-| TAX | full-value property-tax rate per $10,000 | Continuous |
+| TAX | full-value property-tax rate per \$10,000 | Continuous |
 | PTRATIO | pupil-teacher ratio by town | Continuous |
 | B | 1000(Bk - 0.63)^2 where Bk is the proportion of blacks by town | Continuous |
 | LSTAT | % lower status of the population | Continuous |