From the graph, find December's balance growth (December balance - November balance).<br><br>
Plan A: Continue at December's growth rate each month.<br>
Months needed = (4000 - December balance) / December growth rate (round up).<br><br>
Plan B: Increase savings by 20% each month from December's growth.<br>
Use repeated multiplication: growth, growth x 1.2, growth x 1.44, etc., until the running total reaches or exceeds (4000 - December balance). Count the months.<br><br>
Final Answer: Read from the graph and compute.