Me figure this out!

for part a i got increasing by 3% because (1.03) is greater than 1, but i'm not confident that it's right. but for part b i don't know what to do! .

the price f(x), in dollars, of product a after x years is represented by the function below:

f(x) = 0.69(1.03)x

part a: is the price of product a increasing or decreasing and by what percentage per year? justify your answer.

part b: the table below shows the price f(t), in dollars, of product b after t years:

(see attached picture.)

which product recorded a greater percentage change in price over the previous year? justify your answer.