Final answer:
When d=2, the value of c is 3/4.
Step-by-step explanation:
To find the value of c when d=2, we can use the fact that c is directly proportional to d. This means that the ratio of c to d will remain constant. We can set up a proportion using the given values:
c/d = 3/8
Now we can solve for c:
c = (3/8) * 2
c = 3/4
Therefore, when d=2, the value of c is 3/4.