15. 21
16. 38
17. 3072
18. 1
19. 44 (not 100% sure)
20. 11/13
21. 11/12
22. 36
Domain of 2(x + 5) is all real numbers.

Table 3 is showing a proportional relationship between x and y.
Reason:
The value of x in table 3 is its square of value of y,
x y



4 sheets cost $14
2 sheets cost $7
1 sheet costs $3.5
1/2 sheet costs $1.75
answer:
11 1/2 sheets cost $40.25
Answer:
According to me it is quadratic function.