​ Does each equation represent exponential decay or exponential growth?

A =(0.97)^t -Exponential decay

Y =3.7(0.2)^t -Exponential decay

Y =9/11(4)^t -Exponential growth

P =7/9(5/4)^t Exponential growth

V =0.8(9)^t - Exponential growth

P =0.9(8.3)^t - Exponential growth

g(x) =2.1(x) - This is neither - it is linear growth.