Determine whether y varies directly with x. if so, find the constant of variation k and write the equation.

Y does not vary directly with x

Step-by-step explanation:

Direct proportion: When x is directly proportional to y

k=Proportionality constant

When x is directly proportional to y then k remain constant.

x=7 and y=11

Then ,

x=8 and x=13

x=9 and y=15

x=10 and y=17

Value of k does not remain constant .Therefore, y does not vary directly with x.

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

4 and 5)16.97 or 12√2

6)15.59 or 9√3

7)y = 15.59 or 9√3     x =27

8)17.80