Yes this is correct great job!
Step-by-step explanation:
Circumference (C):

Area (A):

Answer:
y = -16
Step-by-step explanation:
Given that,
y varies directly with x. Mathematically, we can write it as follows :

or

Where
k is constant
Put y = 12 and x = -3 to find k. So,

Now put k = -4 and x = 4. So,

So, the required value of y is equal to -16.