lec 3

• Relation is a rule that relates values from a set of values (domain) to a second set of values (range)
• Relation - a pairing of two quantities as ordered pairs (x,y)
• X - input, independent variable, domain, abscissa
• Y - output, dependent variable, range, ordinate
• Type of relation

  1. One-to-one
  2. One-to-many
  3. Many-to-one
  4. Many-to-many
• Function - is a relation where each element in the domain is related to only one value in the range.
• Function Notation - Often in practical applications, the value of one quantity depends on the value of another.