3. Jamie's parents gave him some MUH the year. He spends $15 each month on paper, pens, and other supplies. The graph shows his money decreasing as he spends from month to month.(8 marks) y 100 80 60 60 40 40 20 0 2 4 6 80 10 8 = 15 $ in a meth x PRISE X2-X1 90-60 = |0 O How much money did Jamie's parents give him at the start of the ) What is the slope of the line? ) What is the equation of the line? In how many months will Jamie have spent all the money? tire school year of 9 months?