If right i will mark brainlist 20 extra points

As you may have noticed the formula for gradient is

(Change in yy)/(change in xx)

Therefore

(−5−15)/(−8−−2)(−5−15)/(−8−−2)

=−20/−6=−20/−6

=10/3

step-by-step explanation:

it's is b

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