Direct and Indirect Variations

State what type of variation the equation represents. (a)  

If the both quantities are increasing or decreasing then its called as

If y varies inversely as x, and y = 32 when x = 3, find x when y = 15.

If x varies inversely as the square root of y, and x = 9 when y = 121, find x when y = 81. (a)  

In this type of variation, both x and y are either increasing or both are decreasing (a)  

In this type of variation, x and y are doing the opposite- when one is increasing, the other is decreasing (a)  

Which of the following represents direct variation? (a)  

Y varies directly with x, and y is 84 when x is 16. Which equation represents this situation?

Does the equation show an inverse variation? 
y=10/x

What is the equation that fits this data for either a direct or Inverse Variation?