A scatter plot is shown:
 A scatter plot is shown. Data points are located at 0 and 1, 1 and 1.5, 2 and 2, 3 and 2.5, 4 and 3, 5 and 3.5, 6 and 4, 7 and 4.5, 8 and 5.
 What type of association does the graph show between x and y? (4 points)
 A: Linear positive association
 B: Nonlinear positive association
 c: Linear negative association
 D: Nonlinear negative association