Answer:
Table C
Step-by-step explanation:
Given
Table A to D
Required
Which shows a proportional relationship
To do this, we make use of:

Where k is the constant of proportionality.
In table (A)
x = 2, y = 4



x = 4, y = 9



Both values of k are different. Hence, no proportional relationship
In table (B)
x = 3, y = 4



x = 9, y = 16



Both values of k are different. Hence, no proportional relationship
In table (C):
x = 4, y = 12



x = 5, y = 15



x = 6, y = 18



This shows a proportional relationship because all values of k are the same for this table