Melissa has $275 in her savings account. She plans to deposit $73 each month for the next 12 months. At the end of the year, she will have an account balance of $1151. 275 + 73 +12 = 1151
73(275) + 12 = 1151
275(12) + 73 = 1151
275 + 73(12) = 1151

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