Respuesta :

We have the following function:
 f (x) = 3/8 (4) ^ x
 The function is of the form:
 f (x) = A (b) ^ x
 Where,
 A: initial amount
 b: growth factor (b> 1)
 x: time variable.
 Answer:
 
f (x) = 3/8 (4) ^ x
 
It is an exponential function of the form:
 
f (x) = A (b) ^ x