81, 108, -144, 192,
which formula can be used to describe the sequence?
a. f(x)= -81 (4/3)^x-1
b. f(x)= -81 (-3/4)^x-1
c. f(x)= -81 (-4/3)^x-1
d. f(x)= -81 (3/4)^x-1

C

Step-by-step explanation:

The terms form a geometric sequence with common ratio r

r = = = ......

r = = = -

The n th term formula of a geometric sequence is

= a ← a is the first term

here a = - 81, hence

f(x) = - 81 → C

b) 36

step-by-step explanation:

18 times 2 is 36

answer: 0,6

step-by-step explanation:

this would make it the y intercept.