Chapter 3: Equations in Two Variables

Which of the following equations represents the total cost, C, for the number of sandwiches, S, where each sandwich costs $7?

• S = 7c
• C = 7s
• S = 7/c
• C = s/7

Tags

CCSS.6.EE.C.9

The Astros hit 6 homeruns in 5 games, 12 homeruns in 10 games, and 24 homeruns in 20 games. What is the constant rate of change

• y=(1/2)x
• y=2x
• y=(5/6)x
• y = 1.2x

Tags

CCSS.HSF-LE.A.1B

It took a sled dog team 8.5 hours to travel 161.5 kilometers. What was the average speed of the sled dog team in kilometers per hour?

• 19
• 20
• 21
• 153

Tags

CCSS.6.EE.B.7

At what rate did the rain fall?

• 2 cm per hour

• ¹/₄ cm per hour

• ¹/₂ cm per hour

• 4 cm per hour

Which statement below accurately represents the graph?

• $100 is earned for each hour worked

• $100 is earned for every 2 hours worked

• $500 is earned for every 8 hours worked

• $300 is earned for every 4 hours worked

 y varies directly with x, and y is 84 when x is 16. What is the constant of proportionality?

• y = (21/4)x
• k= 21
• k= 5.25
• k= 4/21

Write an equation for this relationship.

• y=4x
• y=1/8x
• y=1/4x
• y=8x

Tags

CCSS.5.OA.B.3

In a direct variation, y=39 when x=3.  Find the value of y when x=2.

• 26
• 3
• 58.5
• 2

Tags

CCSS.HSF-LE.A.1B

Which graph shows a proportional relationship between x and y?

• A
• B
• C
• D

What ordered pair does a direct variation always go through when graphed?

• (0, 0)
• (1, 0)
• (0, 1)
• (1, 1)

Tags

CCSS.8.EE.B.6