I have a question that says: Medical records indicate that people with more education tend to live longer; the correlation is 0.48. The slope of the linear model that predicts lifespan from years of education suggests that on average people tend to live 0.8 extra years for each additional year of education they have. The slope of the line that would predict years of education from life span is

A0.288 B. 0.384 C. 0.8 D. 1.25 E 1.67

I have a strong feeling that the answer is A 0.288 but do not know how to explain this answer of how to do the work to prove that this is the correct answer? My head just says that it is A.
Please Help
Thank you