I really need help asap!!

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?

You draw a card at random from a deck that contains 33 black cards and 77 red cards.

If f(x)=1/x and g(x)=x+4 which of the following is the graph