constant of proportionality

A dolphin travels through the water at a speed of 25 kilometers per hour. Select two representations that show the distance a dolphin can travel at this rate.

• 
• y = x + 25

• 
• In 5 hours the dolphin can travel 125 kilometers.

Tags

CCSS.7.EE.B.3

CCSS.7.EE.B.4

CCSS.7.RP.A.1

CCSS.7.RP.A.2

CCSS.7.RP.A.3

Which of the following statements is TRUE about the graph? Choose all that apply.

• The point (2, 8) shows that 8 pounds of cheese cost$2.00.

• The point (1.5, 6) shows the cost is $6.00 for 1.5pounds of cheese.

• The point (0.75, 3) shows that 0.75 pound of cheesecosts $3.00.

• The point (0.25, 1) shows the cost is $0.25 for 1pound of cheese.

• The point (0, 0) shows the cost is $0.00 for 0 pounds of cheese

Tags

CCSS.7.RP.A.1

CCSS.7.RP.A.2

When we compare quantities, we compare them as _____ over ______. 

• x over y
• y over x
• rate over one
• peanut butter over jelly

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CCSS.7.RP.A.1

CCSS.7.RP.A.2

CCSS.7.RP.A.3

Cheddar Cheese cost $4.25 per pound. Which equation best represents y, the total cost of x pounds of cheddar cheese?

• x = 4.25y

• y = 4.25x

• y = 4.25 - x

• y = 4.25 + x

Tags

CCSS.7.EE.B.4

CCSS.7.RP.A.2

Write an equation for this situation.

• k=19.25x
• y=19x
• y=19.25x
• y=9.5x

Tags

CCSS.7.EE.B.4

CCSS.7.RP.A.2

Which best describes the graph represented in this table?

•  proportional
• non-proportional

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CCSS.7.RP.A.2

CCSS.7.RP.A.3

Identify the constant of proportionality.

• k = 2x

• k = 2

• k = 4

• none (not proportional)

Tags

CCSS.7.RP.A.2

CCSS.7.RP.A.3

 

The constant of proportionality can be found by finding the __________  _____________.

• proportion answer

• unit rate

• rational number

• ratio rate

Tags

CCSS.7.RP.A.1

CCSS.7.RP.A.2

CCSS.7.RP.A.3

Identify the constant of proportionality.

• k = 1/0.45

• k = 0.45

• k = -0.45

• k = -1/0.45

• none (not proportional)

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CCSS.7.RP.A.2

CCSS.7.RP.A.3

6. AMUSEMENT PARKS The waiting time to ride a roller coaster is 20 minutes when 150 people are in line. How long is the waiting time when 240 people are in line?

• 32 People
• 32 Min.
• 12.5 Min.
• 12.5 People

Tags

CCSS.7.RP.A.2

CCSS.7.RP.A.3