Answer:
1. Not a function
2. function
3. function
4. not a function
5. function
6. function
7. not a function
8. not a function
9. function
10. not a function
11. function
12. function
13. not a function
14. function
15. function
16. not a function
17. not a function
18. Function
19. I can't see it properally sorry
20. Function
This took a long time to write -_-
Step-by-step explanation:
That's a second-degree expression in 'x'. It represents a number,
but the number it represents completely depends on the value of 'x'.
And if the value of 'x' ever changes, then the value of the whole
expression instantly changes.
The expression is also the product of (x + 5) and (x - 9) .
