Proportional Relationships

Jake bought 5 oranges for $2.00. What is the unit price per orange?

• $10.00
• $0.25
• $0.35
• $0.40

For an experiment, Sylvia removes a cold liquid from a refrigerator and measures its temperature every 1/4 minute.
Sylvia find that the temperature increases by 1  3/4 degrees between each measurement for 3 minutes. What is the rate per minute of temperature increase?

• 7 degrees per min
• 7/12 degrees per min
• 1/7 degrees per min
• 6 degrees/min

What is the constant of proportionality?

• 18
• 0.05555...
• 9
• 15

Tags

CCSS.7.RP.A.2B

What is the constant of proportionality?

• 2.75
• 2.5
• 2.6
• 0.363636...

Tags

CCSS.7.RP.A.2B

What is the constant of proportionality?

• 1.3333...
• 0.75
• 0.5
• 1.5

Tags

CCSS.7.RP.A.2B

A technician tests batteries for a battery manufacturer several times each week. She determines that the number of defective batteries is proportional to the number of batteries tested. The table shows the number of batteries the technician tested at two different times during week 1 and the number of defective batters she found each time.  
Between week 1 and week 2, the battery manufacturer changed its process. The number of defective batteries is still proportional to the number of batteries tested, but the constant of proportionality is greater. The technician tested 480 batteries during week 2 and found that 18 were defective. By how much did the constant of proportionality increase?

• 0.125
• 0.0125
• 0.05
• 3.3333...

What is the constant of proportionality?

• 0.0333...
• 30
• 40
• 0.5

What is the constant of proportionality?

• 0.5
• 0.075
• 13.333...
• 15

Which equation models the relationship between days rented (d) and cost (c)?

• d = 30c
• c = 30d
• d = 20c
• c = 20d

Tags

CCSS.6.EE.C.9

Which equation models the relationship between minutes (m) and points (p)?

• p = 0.75m
• m = 0.75p
• p = 0.8m
• m = 0.8p