Enable text based alternatives for graph display and drawing entry

Try Another Version of This Question

Suppose that y is directly proportional to x.

Find the constant of proportionality k if y = 19.5 when x = 13.
k = (Write your answer as a decimal.)
Using the k from above write the variation equation in terms of x.
y =
Using the k from above find y given that x = 29.
y =

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