Answer:
(a)

(b)

(c)
See attachment for graph
Explanation:
Given
P(x) = Perimeter of square
Solving (a): Complete the table
The perimeter of a square is:

so, the table will be completed by multiplying each value of x by 4.
So, we have:

Solving (b): The equation
This has already been stated in (a)

Solving (c): The graph
See attachment for graph