diff --git a/ML/1_linear_reg/Exercise/canada_per_capita_income.csv b/ML/1_linear_reg/Exercise/canada_per_capita_income.csv
index 39dec17e..185e3003 100644
--- a/ML/1_linear_reg/Exercise/canada_per_capita_income.csv
+++ b/ML/1_linear_reg/Exercise/canada_per_capita_income.csv
@@ -1,4 +1,4 @@
-year,per capita income (US$)
+year,pci
 1970,3399.299037
 1971,3768.297935
 1972,4251.175484