Answer:
4 is decay and 5 is growth
4 has a decay rate of 8 %
5 has a growth rate of 20 %
Step-by-step explanation: The decay rate of 4 is 0.92 and for 5 it is 1.2 It is considered decay if the number with the exponent is less than one because it will decrease the value of y when x or in this case t increase. 5 has a rate of 1.2 and therefore it is growing
.92 *100 = 92
100 - 92 = 8
1.2*100 = 120 - 100 = 20
