1. Using k as a constant of variation, write the equation of variation for each of the following. 1. T varles directly as a and inversely as b. 2. Y varies directly as x and Inversely as the square of z. 3. If z varies directly as x and inversely as y. w varies jointly as cand the square of a and inversely as b. 4. P varies directly as the square of x and inversely as s. 5. The pressure P of a gas varles directly as its temperature t and Inversely as its volume V. altitude h. 6. P varies jointly as q and r. 7. V varies jointly as I, w and h 8. The area A of a parallelogram varies jointly as the base b and 9. The electric voltage V varies jointly as the current i and the resistance r. 10. The volume of a cylinder V varies jointly as its height h and the square of the radius r.​