The price of fuel may increase due to demand and decrease due to overproduction. Marco is studying the change in the price of two types of fuel, A and B, over time.
The price f(x), in dollars, of fuel A after x months is represented by the function below:
f(x) = 2.15(0.98)*
Part A: Is the price of fuel A increasing or decreasing and by what percentage per month?
Justify your answer. (5 points)
Part B: The table below shows the price g(m), in dollars, of fuel B after m months.
m (number of months) 1
2
3
4
g(m) (price in dollars) 4.19 3.98 3.78 3.59
Which type of fuel recorded a greater percentage change in price over the previous
month? Justify your answer. (5 points)