Review Quiz

A variation in which the quotient of two variables is constant.

• Combined

• Direct

• Inverse

• Joint

Which of the following describes an inverse variation?

• 
• 
• 
• 

What type of variation relates the amount of money raised in a concert to the number of tickets sold?

• Combined

• Direct

• Inverse

• Joint

Which equation represents a joint variation?

i. a = kbc                          ii. y = k                          iii. A = kh(b₁ + b₂)

• i and ii

• i and iii

• i only

• iii only

Identify the relationship between the number of hours to finish a job to the number of men working.

• Direct

• Inverse

• Joint

• Combined

If a varies jointly as b and c, the equation can be written as _____.

• abc = k

• ac = bk

• None of these

• r varies directly as t and inversely as s

• k varies directly as s and inversely as r

• r varies directly as t and inversely as k

• r varies directly as s and inversely as t

Both m and n vary inversely with each other. When m is 10, n is 6, which of the following is not a possible pair of corresponding values of m and n?

• 12 and 5

• 15 and 4

• 25 and 2.4

• 45 and 3

• Direct

• Inverse

• Joint

• Combined

If 3 men can do a portion of a job in 8 days, how many men can do the same job in 6 days?

• 4

• 5

• 6

• 7