Given: y varies directly with x and has a constant rate of change of 7. when the value of y is 12, then the value of x would be
a. equal to zero
b. less than 2
c. equal to 7
d. greater than 12

b. less than 2

Step-by-step explanation:

When two variables x and y are directly proportional, then

The equation that shows direct variation is given by :-

, where k is the proportionality constant.

Given: The constant rate of change k= 7

The value of y = 12

Substitution the values of k and y in the above equation, we get

70

step-by-step explanation:

2*5=10

4*15=60

60+10=

70

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