What is the slope of the line? Help Please

Which system of linear inequalites is represented by the graph?

Simplify a7/a4 a) 1/a3 b)-a/a2 c)a4/a3 d)a3

Ifurniture stores having a weekend sale and is offering 20% discount on patio chairs and table the sales tax on furniture is 6.25 using function composition how can you represent the total amount a that you would need to pay for this furniture that cost x dollars