Variation Quiz

Which one of the following is the correct way of writing the equation form of inverse variation?

• y = k + x
• y = k/x
• y = k*x
• y = k/x^2

How to determine whether a set of numbers is directly proportional?

• The numbers must be equal to be directly proportional.
• The sum of the numbers must be constant.
• The numbers must be in ascending order.
• A set of numbers is directly proportional if the ratio of corresponding values is constant.

Which of the following is the graph of direct variation?

• 
• 
• 
• 

It is given that m = 0.8 when n = 0.125. Express m in terms of n if m varies directly as n.

• m = 6.4n

• m = 5n

• m = 0.1n

• m = 8n

• 9

• 15

It is given that A varies directly as square of B and inversely as C. If A = 4.8, when B = 6 and C = 1.5, calculate the value of C when A = 0.8 and B = 2.4

• 1.2
• 2.4

• 3.6
• 1.44