Answer
Maximum level of intensity for passion is\[9\]and it occurs after \[3\]years of relationship.
Work Step by Step
Consider the provided graph.
Let x represent number of years.
The curve for passion takes the maximum value of 9 when x is 3.
This implies that passion reaches maximum intensity of \[9\]after\[3\]years in a relationship.
Maximum level of intensity for passion is\[9\]and it occurs after \[3\]years of relationship.