Enable text based alternatives for graph display and drawing entry

Try Another Version of This Question

Suppose that y is inversely proportional to x.

Find the constant of proportionality k if y = 15 when x = 15.
k =
Using the k from above write the variation equation in terms of x.
y =
Using the k from above find y given that x = 20.
y =

If needed, round answer to 3 decimal places.
Enter DNE for Does Not Exist, oo for Infinity