Proportion Equations and Direct Variation

The number of words Janna printed varied directly with the amount of time she spent printing. If she printed 250 words in 5 minutes, how long would it take her to print 1200 words?

• 20 minutes

• 22 minutes

• 24 minutes

• 30 minutes

Which of the following represents the statement, m varies directly as j.

• . j = km

• m = k/j

• k = j/m

• m = kj

If p varies directly as q and p = 18 when q = - 6, then k is __________.

• -3

• -1/3

• 1/3

• 3

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

If m and n vary directly and m = 14 when n = 3.5, what is the value of m when n = 8?

• 4

• 32

• 2

• 6.2

The value of y varies directly with x.  Which function represents the relationship between x and y if y = 20/3 when x = 30?

• y = 200x

• y = 2/9x

• y = 110/3x

• y = 9/2x

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

Tags

CCSS.HSF-LE.A.1B

5. If a varies directly as b, and a = 18 when b = 4.5, find a when b = 8.

• A. 3.2

• B. 4

• C. 32

• D. 74

6. Which of the following table of values illustrates direct variation?

• 
• 
• 
• 

What mathematical statement describes the graph below?

• y = 2/3 x

• y = 3/2 x

• y = 6x

• x = 3/2 y

Tags

CCSS.8.EE.B.6

CCSS.8.F.A.3