Is the following relation a function?

Step-by-step explanation:

A function is a relation between sets that associates to every element of a first set exactly one element of the second set.

Each element from the first set is assigned exactly one element from the second set.

It's not a function, because for 0 are assigned two elements 1 and 3.

16

step-by-step explanation:

2 x 40 = 80

80/5

= 16

1. 3.4/4

2. 0.8/7

3. 0.5 x 3

4. 0.9 x 6

5. 10.8

6. 2.35

7. 0.567

8. 9.35

9. 0.02

10. 0.06

11. 0.16

12. 0.42

13. 0.63

14. 5.6

15. 8.1

16. 9.9

17. 0.28

18. 0.48

19. 0.27

20. 0.49

21. 0.45

22. 0.72

23. 0.9

24. 0.88

25. 0.75

26. 0.16

27. 0.328

28. 0.495

29. 0.72

30. 1.068