What is the answer to these problems

High schoolmathematics 5 points keith is the leading goal scorer for a team in an ice hockey league. last season, he scored 42 goals in 82 games. assuming he scores goals at a constant rate, what is the slope of the line that represents this relationship if the number of games is along the x-axis and the number of goals is along the y-axis?

Which one ? is the answer and how to find this answer

If private savings 'v' = 0.75s and total savings 's' equals $4.20 billion, solve for public and private savings.