The points (18,21) and (30,35) form a proportional relationship. Find the slope of the line through the points. Then use the slope to graph the line

c. (3,2,6) is the answer.

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

there are no multiple choices

no solution exists the way you wrote the equation.