Is y=-2/5x proportional or not, if it is what is the constant proportionality? is 7+8x=y proportional or not, if it is what is the constant proportionality?

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.

Plz.yesterday, the snow was 2 feet deep in front of archie’s house. today, the snow depth dropped to 1.6 feet because the day is so warm. what is the percent change in the depth of the snow?

Which of the following values are in the range of the function graphed below? check all that apply ! - will give the answer "brainliest! "