Find the slope of each line

1) m = -1/3

2) m = 3

3) m = -3/2

4) m = 3/2

5) m = 5/3

6) m = 7/3

7) m = -6/2 (or -3)

8) m = 7/3

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