A P = 20 --> Q d = -0.25 X 20 + 275 = 270
correct P = 50 --> Q d = -0.25 X 50 + 275 = 262.5 Not the right formula
B P = 20 --> Q d = -0.25 X 20 + 162.5 = 157,5 Not ...
C P = 20 --> -4 X 20 + 275 = 195 Not ...
D P = 20 --> - 4 X 20 + 350= 270 Correct
P = 50 --> - 4 X 50 + 350 = 150 Correct
D Q d = - 4 P + 350 is the correct formula