Yes, exponential or log I think! It is a function — use vertical line test
Answer:

Step-by-step explanation:
18d + 12
The greatest common factor is 6, So we need to factor out 6
=> 6 ( 3d + 2 ) [Distributive property has been applied and this is the simplest form]
It would be D
Hope this helps! :)
~Zain