What is the slope and y-intercept for the following equation 5y-2x=15

Olga used 100 ounces of flour to make 225 muffins. how many ounces of flour will be used to make 300 muffins?

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?

Last one and the bottom answer choice is y=(x-4)^2+1 you guys!