Answer
Occurs after approximately\[5.5\]years.
Work Step by Step
Consider the provided graph.
Let x represent number of years.
From the given graph it is seen than graph for passion reaches maximum intensity of \[9\] and graph of commitment is less than \[9\] till \[5.5\]years, after that it increases the maximum level for passion.
Level of intensity for commitment increases maximum level of intensity for passion after approximately\[5.5\]years of relationship.