y varies inversely to x and when y=20 then x=2

Question

whats the constant variation?

Answer 1

inverse variation is represented:

y = k/x where k is the constant of variation

 

multiply both sides by x to get:

xy = k

 

if y=20 and x=2 

then xy = (2)(20) = 40 = k

 

So, the constant of variation is 40.