The price of products may increase due to inflation and decrease due to deprecation. Derek is studying the change in the price of two products, A and B, over time. 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:
t(number of years) 1. 2. 3. 4.
f(t) (price in dollars)10,100. 10,201. 10,301. 10,406.

Which product recorder a greater percentage change in price over the previous year?