Answer:
Curvilinear relationship
Explanation:
In psychology, curvilinear relationship between the two variables exist such that "if one variable increase then the other will increase too, but if we keep on increasing the variable then at certain point other variable start to decrease". If we draw a graph of it , it gave the inverted U shape structure that explains this relationship more significantly. Just like in this case more a song played on radio, more the liking for this song. But if the song played too much, people will eventually get bored of it and start disliking the song.