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1. Find the variation constant and an equation of variation where y varies inversely as x and y 10 when x 9. The variation constant is _______________

2. Find an equation of variation where y varies directly as the square of x, and where y= 0.57 when x =0.1 The equation of variation is y____________

3. Find an equation of variation where y varies jointly as x and the square of z, and where y=385 when x= 22 and z= 5

The equation of variation is y_______________ (simplify fraction )

4. the stopping distance D of a car after the brakes have been applied varies directly as the square of the speed R. if a car traveling 60 mph can stop in 200ft how fast can a car travel and still stop in 288 ft?

the car travel at a speed of ____ mph