This Paper Is a Study of Part of the Calculus Project’S Program For High School Students from the Lowest Quartile of Academic Achievement, Social and Economic Status. the Study Focuses on Students’ Learning the Concept of Function and Relation. This Research Is on Mathematics Students’ Understandings of the Distinction Between the Concepts of Function and Relation. the Main Research Question Investigates the Students’ Awareness of the ‘‘Discrimination Between the Concept of Function and Relation.