Could someone possibly explain to me how to do this?

What is the slope simplify your answer and write it as a proper fraction, improper fraction, or integer

Identify the type of observational study described. a statistical analyst obtains data about ankle injuries by examining a hospital's records from the past 3 years. cross-sectional retrospective prospective

Aye asap pls ! markin da brainiest too ! btw da step choices are all add, distribute, divide, n subtract