We take the function as a sequence
Term 1 ⇒ 5
Term 2 ⇒ 4
Term 3 ⇒ 3.2
Between terms, there is a common ratio of ⁴/₅
We get it from here:
Term 2 / Term 1 =

Term 3 / Term 2 =

=

When a sequence has a common ratio between term, the sequence is a Geometric Sequence

Where

is the first term,

is the common ratio, and

is the term number
We have:

and

The formula for the function is
Answer:
Look below.
Step-by-step explanation:

Use a calculator.
SF = 9/18 = 1/2 or 0.5
answer
1/2 or 0.5
imma go with my gut and say b :?
Answer:
12%
Step-by-step explanation:
I = Prt
r = I/Pt
r = 792 / 2200(3)
r = 0.12