How do you tell if there is an infinite amount of solutions?

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?

Ihonestly have no clue if it's each or none.

Find two numbers if their sum is 91 and the ratio is 6: 7?