When Hyacinth creates a scatterplot that shows the number of bystanders who witness an emergency and the length of time for help to be given, the points on the scatterplot fall roughly along a line that slants down and to the right. Based on her scatterplot, Hyacinth can conclude that the number of witnesses and the time to offer help:

a. are positively correlated
b. are negatively correlated
c. are only weakly correlated
d. have a cause-and-effect relationship

B