Could someone help me and explain how to do this!?

B

Step-by-step explanation:

the cost is $8, and it goes for 40% off, so the discount is 8*40%=3.2;

then the sale price = 8-3.2 = 4.8.

from the figure we get,

the x axis shows   the months and,

the y-axis shows the number of satisfied customer.

each line or each cell in upward direction (y-axis) shows 500.

the appropriate scale for the y - axis is: -

a = 2000 customers

b = 4000 customers

c = 6000 customers

d = 8000 customers

e = 10000 customers

f = 12000 customers

g = 14000 customers