Find the slope of the line that contains (2, -10) and (-4,2)

There were 816 people at a concert when a band started to play. after each song, only half the people stayed to hear the next song. how many people were left at the concert after x songs? write a function to represent this scenario.

What could explain what happened when the time was equal to 120 minutes

Solve for x and y: 217x + 131y = 913; 131x + 217y = 827