Jon and lexi are playing a marble game. according to their rules, 6 points are awarded for each red marble collected and 2 points are awarded for each blue marble collected. which expression represents jon's total score if he has r red marbles and b blue marbles? (1 point)

Researchers were interested in whether relaxation training decreases the number of headaches a person experiences. they randomly assigned 20 participants to a control group or a relaxation training group and noted the change in number of headaches each group reported from the week before training to the week after training. which statistical analysis should be performed to answer the researchers' question?