express each of the ff. by means of an equation using k as the constant of variation 1. the cost (c) of chicken varies directly as its weight (w) 2. water pressure (p) varies directly as the height (h) of the water 3. mila's commision (c) varies as the number of (n) dresses sold 4. m varies directly as the square of P 5. the temperature (t) at which water boils varies inversely as the number of feet (h) above sea