1. A set of ordered pairs of real numbers is called a 2. The set of all first coordinates in a relation is called the of the relation of the relation 3. The set of all second coordinates in a relation is called the 4. The vertical line in a Cartesian piane is called the 5. The horizontal line in a Cartesian plane is called the 6. Suppose that a set of ordered pairs has no pairs having the same first coordinates. Such a set is called a(an) 7 A method of determining whether or not a graph represents a function is called the 8. The other term of the value of x in a coordinate is called 9-10. For the function {(3,4), (6,0), (-3,-1)} , the set { 3,6,-3} is called the set {4,0,-1} is called the