For the values in each table, determine if direct variation exists between the variables. If it does, state the constant of variation.

Question

a). x y

-1 -1

4 14

8 26

20 62

b). x y

-3 3/2

2 -1

15 -15/2

21 -21/2

c). x y

0 0

1 2

2 8

3 26

Answer 1

Hello

Number 1 and 3 there is no constant variation.

Number 2 has a direct variation. The way to solve it would be to divide each order pair --> x/y

So for example for B each time you divide x/y for each order pair you get -2 back. That means the variation is constant.

For A and C this is not the case.