Algebra help. Will give medal!!!

Question

anonymous · Answer

3.	The price of products may increase due to inflation and decrease due to depreciation. Luke 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.


Part A: Is the price of product A increasing or decreasing and by what percentage per year? Justify your answer. (5 points)
Part B: The table below shows the price f(t), in dollars, of product B after t years:
 
Which product recorded a greater percentage change in price over the previous year? Justify your answer. (5 points).
Part A: Is the graph for         increasing or decreasing?

Justify your answer:
It is increasing
Part B: What is the average rate of change from year 1 to year 2?

Convert this number into a percentage. 

Which product has a greater percentage change in price?

anonymous · Answer

@mathmath333 I still need help here?

anonymous · Answer

@TheSmartOne can you help me?

solomonzelman · Answer

I think some information is missing

thesmartone · Answer

^^^^

anonymous · Answer

give  me a sec

anonymous · Answer

F(x)=0.69(1.03)^x

anonymous · Answer

@TheSmartOne I found the function

anonymous · Answer

do you need the table too??

mathmath333 · Answer

$\large\tt \begin{align} \color{black}{
f(x)=0.69(1.03)^x \~\
  =0.69(1+0.3)^x \~\
=0.69(1+0.3)^x \~\
  =0.69(1+(\dfrac{\color{red}{30}}{100}))^x \~\
 }\end{align}$

so it is increasing by $30\%$ per year

for part B ,table is missing

anonymous · Answer

|dw:1420408039604:dw|
@mathstudent55 can you help me?
@mathmath333