WORTH 70 POINTS Suppose that y is directly proportional to x.

Find the constant of proportionality k if y = 16.8 when x = 4.

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 = 10.

y =

If needed, round answer to 3 decimal places.

Enter DNE for Does Not Exist, oo for Infinity