if x= 5 when y= -1/3 , find y when x =10 (inverse variation problem)

y = kx    where k is the proportionality constant

So we have...

-1/3 = k(5)   .......divide both sides by 5 , we have

-1/15 = k      .......so when x = 10, we have

y = (-1/15)(10)  = -2/3

Note that as x gets larger, y gets smaller........