Constant of Proportionality Writing Equations

If the constant of proportionality is 10, which of the following is the correct proportional equation?

• 10=kx

• 10=k

• y=10k

• y=10x

Tags

CCSS.7.RP.A.2C

The equation y=5x describes a proportional relationship between x and y. What is the constant of proportionality?

• 6

• 4

• 7

• 5

Tags

CCSS.7.RP.A.2B

The constant of proportionality in the equation y = ½x is _______. 

• x

• y

• 1/2

• 2

Tags

CCSS.7.RP.A.2B

Find the constant of proportionality.

32 liters in 2 minutes = ________ liters per minute

• 16

• 12

• 10

• 8

Tags

CCSS.7.RP.A.2B

What is the constant of proportionality in the equation y = 7x?

• y

• x

• 7

Tags

CCSS.7.RP.A.2B

If a car travels 60 miles in 2 hours, what is the constant of proportionality that describes the relationship between distance (y) and time (x)?

• 30

• 20

• 40

• 50

Tags

CCSS.7.RP.A.2B

Apples cost $3 per kilogram. Which equation best represents y, the total cost of x kilograms of apples?

• x = 3y

• y = 3x

• y = 3 - x

• y = 3 + x

Tags

CCSS.6.EE.C.9

The constant of proportionality is also the unit rate.

• True

• False

Tags

CCSS.7.RP.A.2B

Craig earns extra money as a lifeguard. He earns $37 for 4 hours and $64.75 for 7 hours.  What is the constant of proportionality? 

• $37 per hour

• $64.75 per hour

• $9.25 per hour

• $18.50 per hour

Tags

CCSS.7.RP.A.2B

Write the equation for the table given

• y = 1/3x

• y = 3x

• y = 1/2x

Tags

CCSS.6.EE.C.9