Which of the following is not a factor of the polynomial function shown in the graph? 100 points!

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?

Can someone explain to me how to do

In which direction does the left side of the graph of this function point? a(x) = 3x - x2 + 4x - 2