[[☃ image 2]] ===== Jacob distributed a survey to his fellow students asking them how many hours they'd spent playing sports in the past day. He also asked them to rate their mood on a scale from $0$ to $10$, with $10$ being the happiest. He plotted the results in the scatter plot shown at left. Which of the following is the best estimate of the average change in mood rating associated with a $1$ hour increase in hours playing sports? [[☃ radio 1]]