Can someone tell me what is the slope of the line that includes points (4,-10) and (6,8)

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.

Write numerical coefficient of y² in the expression 2x² - 15xy – 7y²

Which of the following expressions is equal to 2x^2+8