Determine whether y varies directly with x if so find the constant of variation of k write the equation x= 5,10,15,20 y=25,25,70,90

No , y does bot varies directly with x.

Step-by-step explanation:

The given table :

x= 5,10,15,20

y=25,25,70,90

As we observe the given data , we conclude that y does bot varies directly with x because one value of y corresponds to two different values of x.

i.e. y=25 corresponds to two x-values x-5 and x=10.

Therefore, y does bot varies directly with x.

Two quantities are said said to be in direct variation , if one quantity increases or decreases with respect to increase of decrease the second quantity (respectively) .