11. if y is inversely proportional to x and y=7 when x=9, find x when y=14

2. Identfy which one is correct

8x-2y=2

a. direct

b. inverse

c. neither

3. if y varies directly as x, and the constant of variation is -3, which equation represents the correct problem

a. y=-3x

b. y=3x

y= -3/x

y= x/-3

4. If the point (12,4) lies on the graph of a DIRECT variation, what is the constant of variation?

a. 8

b. 1/3

c.3

d. 48

5. w varies directly as r cubed and inversely as s

if w=24 when r=4 and s=8, find r when w=81 and s=27

6. The volume, V, of a gas varies directly as the temperature, t, and inversely as the pressure, P. At a temperature of 200 degrees and the pressure of 500mmHG, the volume of the gas is 240cm3. Find the volume of the gas at a temperature of 275 degrees and a pressure of 400 mmHG.