事例4_販売価格と販売数n

A: (1440, 496)
B: (1560, 455)
C: (1800, 385)
D: (1920, 317)
E: (2160, 261)
F: (2400, 162)
G: (2520, 150)
H: (2640, 118)
I: (2760, 100)
a = -0.3 (slider from -1 to 0, step 0.01)
b = 910 (slider from 0 to 1000, step 0.1)
f: y = (a * x) + b