The graph of a function is a line. True or False

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?

Which graph represents the given linear function 4x+2y=3

Math question.. plz me .. best answer all