Variation Review Test

This type of variation states that the two quantities increase at the same time or decrease at the same time.

• Direct Variation

• Inverse Variation

• Joint Variation

• Combined Variation

The cost c varies directly as the number of n pencils is written as

• c = kn

• k = cn

• n = k/c

• c = k/n

A type of variation that involves 3 or more quantities that may vary directly.

• Direct Variation

• Inverse Variation

• Joint Variation

• Combined Variation

The speed r of a moving object is inversely proportional to the time t travelled is written as

• r = kt

• r = k/t

• t = kr

• t = r/k

Which of the following types of variation states that the decrease of one quantity results to the increase of the other quantity?

• Direct Variation

• Inverse Variaton

• Joint Variation

• Combined Variation

If y varies directly as x and y = 24, when x = 3, then what is the value of k?

• 4

• 6

• 8

• 72

Which of the following phrases illustrate an inverse variation?

• The area of the wall to the amount of paint used to cover it

• The amount of money raised in a concert to the number of tickets sold

• The time a teacher spends in checking papers to the number of students

• The age of a used car to its resale value

This is a variation where one quantity varies directly to other quantity and inversely to the other quantity.

• Direct Variation

• Inverse Variation

• Joint Variaiton

• Combined Variation

This is a variation where one quantity varies directly to other quantity and inversely to the other quantity.

• Direct Variation

• Inverse Variation

• Joint Variaiton

• Combined Variation

If y varies inversely as x and x=5 when y=20, then what is the constant of variation, k? 

• 121
• 4
• 100
• 6