1. A set of ordered pairs is called a __________.

2. A set of ordered pairs is called a relation.

3. A ________ is a set of ordered pairs in which no two ordered pairs have the same first coordinate and different second coordinates.

4. A function is a set of ordered pairs in which no two ordered pairs have the same first coordinate and different second coordinates.

5. The ________ of a function is the set of all the _____ coordinates of the ordered pairs.

6. The domain of a function is the set of all the first (x) coordinates of the ordered pairs.

7. The ________ of a function is the set of all the ______ coordinates.

8. The range of a function is the set of all the second (y) coordinates.

9. The domain is the _____variable.

10. The domain is the x variable.

11. The range is the _____ variable.

12. The range is the y variable.

13. Functional Notation
f ( x)

14. Vertical Line Test for Functions
A graph is the graph of a function if and only if no vertical line intersects the graph at more than one point.

15. Increasing, Decreasing and Constant Functions
If a and b are elements of an interval I that is a subset of the domain of a function f, then

16. Increasing, Decreasing and Constant Functions
If a and b are elements of an interval I that is a subset of the domain of a function f, then
f is increasing on I if f(a) < f(b) whenever a < b.

17. Increasing, Decreasing and Constant Functions
If a and b are elements of an interval I that is a subset of the domain of a function f, then
f is increasing on I if f(a) < f(b) whenever a < b.
f is decreasing on I is f(a) > f(b) whenever a > b.

18. Increasing, Decreasing and Constant Functions
If a and b are elements of an interval I that is a subset of the domain of a function f, then
f is increasing on I if f(a) < f(b) whenever a < b.
f is decreasing on I is f(a) > f(b) whenever a > b.
f is constant on I if f(a) = f(b) for all a and b.

19. Horizontal Line Test
If every horizontal line intersects the graph of a function at most once, then the graph is the graph of a one to one function.

20. Functions whose graphs can be drawn without lifting the pencil off the paper are called continuous functions.

21. Functions with holes, breaks, or gaps have discontinuities.

22. Greatest Integer Function