Mathematic 9 - 2nd Quarter - Summative Exam

Which of the following represents the statement, a varies directly as z.

• z = kz

• a = k / z

• k = a / z

• a = kz

If p varies directly as q and p = 35 when q = 5, then k is __________.

• -7

• - 1 / 7

• 1 / 7

• 7

The amount (A) of money raised in a concert to the number (n) of tickets sold is an example of what kind of variation?

• direct

• inverse

• joint

• combined

In the variation equation M = 2t. What happens to M when t is doubled?

• M is halved

• M is doubled

• M is tripled

• M becomes zero

Which of the following table of values illustrates direct variation?

• 
• 
• 
• 

If a varies directly as b, and a = 48 when b =16, find a when b = 8.

• 8

• 12

• 24

• 56

• 
• 
• 
• 

Given that y varies directly as x, find the missing values of x and y in the table below

• x = 27; y = 6

• x =30; y = 6

• x = 27; y = 3

• x = 6; y = 27

If 4 identical packages weigh 120 kg. How much will 16 of these packages weigh?

• 64 kg

• 120 kg

• 480 kg

• 1920 kg

The proportion x₁ = k / y₂ illustrates ___________ variation

• Direct

• Inverse

• None of the above

• All of the above