eddie expects the relationship between the assertiveness of one's instructor to be related to student's satisfaction level with the course. specifically, he expects low levels of assertiveness to yield low levels of satisfaction, moderate levels of assertiveness to yield high levels of satisfaction, and high levels of assertiveness to yield low levels of satisfaction. in other words, he expects a curvilinear relationship between instructor assertiveness and supervisor satisfaction. should he use pearson's r to summarize the relationship between the variables?