I need help with 2, 3, and 4

Choose the point slope form of the equation below that represents the like that passes through the points (-6,4) and (2, 0)

The vertices of a triangle are a(7,5), b(4,2), c(9,2). what is m

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?