CCSS.Math.Content.7.RP.A.2

What does the Direct Variation Equation look like?

• y= kx
• y = mx + b
• y = b
• y = x

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CCSS.Math.Content.7.RP.A.2

A tree is 12 feet tall and casts a shadow 9 feet long. A building nearby casts a shadow that measures 24 feet. How tall is the building? (Draw a picture, set up a proportion)

• 24 feet
• 21 feet
• 27 feet
• 32 feet

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CCSS.Math.Content.7.RP.A.2

Using a proportion, find the height of the tree.

• x = 0.0625 ft.
• 16 ft
• x = 16 ft.

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CCSS.Math.Content.7.RP.A.2

The number of kilograms of water in a person’s body varies directly as the person’s mass.  A person with a mass of 90 kg contains 60 kg of water.  How many kilograms of water are in a person whose mass is 75 kg?

• 50 kg water
• 72 kg water
• 94 kg water
• 150 kg water

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CCSS.Math.Content.7.RP.A.2

Is the given table a proportional relationship? If so, what is the constant?

• Yes; 1/3
• Yes; 3
• Yes; 5
• No

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CCSS.Math.Content.7.RP.A.2

What is the scale factor if the triangle on the left is the original?

• 2
• 3/2
• 2/3
• 1/2

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CCSS.Math.Content.7.RP.A.2

Write an equation for this situation.

• y=9.75x
• y=19x
• y=19.25x
• y=9.5x

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CCSS.Math.Content.7.RP.A.2

Solve the proportion.

• k=5
• k=3.3333333
• k=60
• k=90

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CCSS.Math.Content.7.RP.A.2

What does the point (2, 94) represent in this situation?

• Every week, they earn $94.
• After 94 weeks, they save $2.
• After 1 week, they save $47.
• After 2 weeks, they save $94.

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CCSS.Math.Content.7.RP.A.2

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

• x = 4.25 + y

• x = 4.25y

• y = 4.25 + x

• y = 4.25x

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CCSS.Math.Content.7.RP.A.2