Please help for brainliest! :)

Describe the constraints of the domain.

(graph is attached below)

These constraints consist of physical translation of the business rules that apply to the content of the data item. They represent an attribute value relationship, not an entity occurrence relationship, and therefore should not have any keyed activity. There should be no key propagation.

answer: c

substitute in the values.

for a:

f(0) = 0 + 9

f(0) = 9

a is a solution.

for b:

f(7) = 14 + 9

f(7) = 23

b is a solution.

for c:

f (3) = 6 + 9

f(3) = 15

c is not a solution. it's supposed to be 14.

for d:

f(2) = 4 + 9

f(2)= 13

d is a solution.