Question

If y varies inversely as x, and y = 12 when x = 6, what is K, the variation constant? A. 2 B. 72 C. 144 D. 1/3

Answer 1

In this question, it is given that y varies inversely as x . So the equation is

$y = \frac{k}{x}$

And here k is the proportionality constant .

And when x=6, y=12

$12 = \frac{k}{6} \\ k =72$

So the values of the proportionality constant k is 72 and the correct option is B.