Whats the slope of the graph -4, 5 1,-7.5

I’m still confused on how to work the percentages

Select the correct answer and solve for y

Astrid spent $36 on new shoes. this was $12 less than twice what she spent on a new skirt. part a: which equation would solve for how much she spent on the skirt? part b: solve the equation in the workspace provided below. how much did astrid spend on her skirt?