Answer:
option B is correct
The constant of variation for the given quadratic equation is, 0.6
Explanation:
The quadratic variation is the relationship between the variables x and y such that :
; where k is the quadratic constant variation.
Given quadratic equation are as follow:
...[1]
Division property of equality states that you divide the same number to both sides of an equation
Divide equation [1] both side by 10,we get

On simplifying we get;
or

Now, compare above equation with an equation
we get the value of k
i.e, k= 0.6
Therefore, the constant of variation is, 0.6.