Question

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

Answer 1

xy = k
7 times 3 = k
k = 21

Answer 2

For this case we have the following expression:

`xy = k`
To find the constant k, what we must do is replace the following values in the given equation:

`x = 7 y = 3`
Substituting values we have:

`k = (7) (3) k = 21`
Answer:
the constant of variation, k, is:

`k = 21`