Suppose the z varies jointly with x and y

Question

Find the constant of proportionality k if z=345.8 when y=19 and x=7

k=?

Using k from above, write the variation equation in terms of x and y

z=?

Using the k from above find z given that y=40 and x=24

z=?

Answer 1

The joint variation equation is 345.8=k*19*7.

Solve for the proportionality constant k and then answer the other 2 questions.