Please help me on these two :)

What is the difference between regular convex and concave polygons

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?

Write a story that matches with the expression 42x-5 pls hurry