A bookstore is selling books for 10 bucks each which grape shows the relationships between the number of books x, the store sold and the total amount of money y PAIED form the book sales

B

Step-by-step explanation:

Please look at the photo below, i think it is your full question

The correct answer is B. Because from the question, we can form the equation as:

Y =10X

and we can make a table:

X    Y

1      10

2     20

3     30  

Only Gragh B fit with all the values of X and Y .

1.4

2.3

step-by-step explanation:

the formula for the constant of variation is

y= kx

divide each side by x

y/x =kx/x

y/x =k

we know a and y

1.   y/x = k

4/1 =4

check the other values to make sure they are the same

8/2 = 4   12/3 =4   and 16/4 =4  

the constant of variation is 4

2.   y/x = k

3/1 =3

check the other values to make sure they are the same

6/2 = 3   9/3 =3   and 12/4 =3  

the constant of variation is 3

do a back flip do it do it doit