VARIATIONS (LONG TEST 1A)

Which of the following variations produces pairs of numbers in which their ratio is a constant?

(45 seconds)

• direct variation

• inverse variation

• joint variation

• combined variation

Which of the following equations is an example of direct variation?

(45 seconds)

• m = 8d

• 20 = xy

Which of the following statements is an example of direct variation?

(1.5 minutes)

• The number of hours (t) to finish the job to the number of men (m) working.

• The number of persons (p) sharing a pizza to the size (s) of the slices.

• The number of students (s) renting an apartment to the amount of money (m) that each of them will share for the rent.

• The amount of money (m) raised in a concert to the number of tickets (t) sold.

Which of the following table of values represents direct variation?

(3 minutes)

• 
• 
• 
• 

If y varies directly as x and y = 48 when x = 4, what is the constant of variation?

(2 minutes)

• 8

• 12

• 16

• 24

What is the constant of variation of the given table of values?

(2 minutes)

• -16

• -12

• -8

• -4

What is the equation of variation of the given graph?

(2 minutes)

• w = 9c

• c = 9w

Which of the following variations has the product of two quantities as the constant?

(45 seconds)

• direct variation

• inverse variation

• joint variation

• combined variation

What do you call a variation when more than one type of variation occurs in the same equation?

(45 seconds)

• direct variation

• inverse variation

• joint variation

• combined variation

If W varies jointly as p, q, r and s, what is the equation for k?

(1.5 minutes)

• k = Wpqrs

• k = pqrs