12. Which of the following correspondences of relations does not describe a function?
A. one-to-one
B. many-to-one
D. none among A, B, and C
C. one-to-many
13. The set of all the second elements in a relation is known as
B. domain
C. function
D. range
A. array
A. array
A. graph
A. graph
14. The set of all the first elements in a relation is known as
B. domain
C. function
D. range
15. Which of the following ways of representing relations can be done vertically or horizontally?
B. rule C. mapping diagram D. table
16. Which of the following ways of representing relations require skills in point plotting?
B. rule C. mapping diagram D. table
17. Which of the following ways of representing relations can show the
correspondence of the relation?
B. A. graph
B. rule C. mapping diagram D. table
18. A type of relation where each element in the domain is paired to exactly one element
in the range is known as
A. one-to-one B. many-to-one C. one-to-many D. many-to-many
19. A type of relation where more than one element in the domain is paired to only one element
in the range is known as
A. one-to-one B. many-to-one
C. one-to-many D. many-to-many​