38937
A real function , that is a function from real numbers to real numbers can be represented by a graph in the Cartesian plane ; such a function is continuous if , roughly speaking , the graph is a single unbroken curve whose domain is the entire real line .
 Cartesian
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Cartesian