Topic 2 Test Retake

The equation y = 3.2x represents a proportional relationship. What is the constant of proportionality?

• x

• y

• 3.2

• 1/3.2

Is this table proportional? What is the constant of proportionality? (Think Coffee as x and Cost as y)

• Yes ; 3

• Yes

• no ; there is no constant of proportionality.

• no ; 2

Is this graph proportional? If so, match the correct equation to the graph.

• no; y = 4x

• yes; y = 9x

• no; no matching equation

• yes; y = 3x

Patrick drove 336 miles in 5 hours. How fast was he driving, in miles per hour?

• 57.6 miles per hour

• 60.4 miles per hour

• 67.2 miles per hour

• 60 miles per hour

Pat needs 14 sticks of pepperoni to make 28 pizzas.  How many sticks of pepperoni are needed to make 36 pizzas?  

• 15 pizzas
• 252 sticks
• 18 sticks
• 18 pizzas

Tags

CCSS.6.RP.A.1

CCSS.6.RP.A.2

CCSS.6.RP.A.3

Does the graph represent a proportional relationship?

• Yes

• No

Tags

CCSS.7.RP.A.2D

The graph shows a proportional relationship between time and number of boxes a machine packages. How many boxes does the machine package in 3 ​minutes?

Which of these graphs shows a proportional relationship?

• A

• B

Elise needs to buy some dog food. At the nearest​ store, 7 bags of dog food cost ​$12.50. How much would Elise spend on 14 bags of dog ​food?

• $25

• $12

• $7

• $10

What is the constant of proportionality in miles per hour? How far will this person travel in 9 hours?

• 45 miles per hour ; 405 miles

• 45 miles per hour ; 279 miles

• 90 miles per hour ; 400 miles

• 90 miles per hour ; 300 miles