explanation please 
The scatter plot shows the relationship between the amount of time, in hours, students in a Spanish class slept the night before an exam and their score on the exam.
Which of the following describes the pattern of association for the scatter plot?
 There is a positive linear association.
 There is a positive nonlinear association.
 There is a negative linear association.
 There is a negative nonlinear association.
                                             
                                          
                                          
                                       