Help fast it's timed please

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?

If f(x)=3x+1 and f^-1=x-1/3, then f^-1(7)=

He that is measured at 220° is a reflex angle. the opposite angle is obtuse. find the measure of obtuse .