When ”Lancer” Notebook’s price Rp 5.000.000,00/unit, the demand’s 80 unit. Notebook’s price is up to 10%, and causing the demand decreased to 60 unit. Based on that data, the demand’s function is showed by....

a. Q = -4 P + 1200

b. Q = 4P - 1200

c. Q = -4P + 280

d. Q = 4P - 280

e. 5Q = -20 P + 600