In this case, we must analyze the graphs to find the solution.
Step 01:
Graph A 
Dollars vs Months 
If Months = 4 ===> 400 Dollars
Graph B
Months vs Dollars 
If Dollars = 4 ===> 400 Months 
If Months = 4 ===> The dollar amount is imperceptible on the graph. 
The answer is: 
The graphics are different.