Answer:
Exponential growth A, B;
exponential decay C, E;
neither D.
Step-by-step explanation:
The function
- represents exponential growth when

- represents exponential decay when

A. The equation
represents exponential growth, because 
B. The equation
represents exponential growth, because 
C. The equation
represents exponential decay, because 
D. The equation
represents neither exponential growth nor exponential decay, because this function is linear.
E. The equation
represents exponential decay, because 