11. find the values of x and y.
(1 pc
(14y+30)°
(3x)0
156°
x=8, y = 9
x = 10, y = 9
x = 8, y = 10

78.59 is the mean

step-by-step explanation:

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

just sum

10 + 10 = 20