Question

For the inverse variation equation xy = k, what is the constant of variation, k, when x = 7 and y = 3?

A. 3/7

B. 7/3

C. 10

D. 21

Answer 1

D) 21

Explanation:

The given inverse variation equation is x.y = k, where k is the constant of proportionality.

Given: x = 7 and y = 3.

We need to find the constant variation, k.

To find the constant variation, k, plug in x = 7 and y = 3 in the given equation and simplify.

k = 7*3

k = 21.

Therefore, the constant of variation k = 21.

Answer is D) 21.

Answer 2

D. 21

Explanation:

The equation tells you xy = k. Substituting the given values, you get ...

7·3 = k

21 = k