Hi if you can help me that’d be great! Just show me the work/steps you took to answering the question and your explanation!

Find the slope of the line y =8/9x + 1.

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?

Last one and the bottom answer choice is y=(x-4)^2+1 you guys!