I think it’s A tbh because f(x) goes into 1. And that becomes a straight line. And linear is a straight line.
Answer: option a.
Step-by-step explanation:
To solve the given exercise nad write the expression as a single logarithm, you must keep on mind the following properties:

Therefore, by applying the properties shown above, you can rewrite the expression given, as following:

Then, the answer is the option a.
Hmmmmmmmmmmmmmm ummmmmmmmm hmmmmmmmmmmm..
I found your complete question in another source.
See attached image.
For this case what you should see is that you have two similar triangles.
We then have the following relationship:
((AB) / (BX)) = ((CD) / (DX))
We cleared CD:
CD = ((AB) / (BX)) * (DX)
Substituting the values:
CD = ((12) / (5)) * (2.5)
CD = 6
Answer:
CD = 6
Decibel is directly proportional to number of cars passing the point. That is,
69 db ----- 139 cars
x db ----- 17 cars
x = number of cars passing the point per minute on a weekend.
Then,
x= (69*17)/139 = 8.43 db ≈ 8 db