Proportionality Review

Nathan runs $1\ \frac{1}{2}$  miles in 20 minutes. How fast does he run in miles per hour?

•  $2\ \frac{1}{2}$  mph

•  $1\ \frac{1}{2}$  mph

•  $3\ \frac{1}{2}$  mph

•  $4\ \frac{1}{2}$  mph

Tags

CCSS.7.RP.A.1

Alex makes $11 every 2 hours. How much would he make if he works 7 hours?

• $22

• $38.50

• $77

• $32.75

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CCSS.6.RP.A.3B

Alex makes $11 every 2 hours. How long did Alex work if he made $68.75?

• 11.5 hours

• 12 hours

• 12.5 hours

• 13 hours

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CCSS.6.NS.B.3

A person who weighs 120 pounds on Earth would weigh 45.2 pounds on Mars. How much would a child who weighs 45 pounds on Earth weigh on Mars? (Round to the nearest whole number)

• 16 pounds

• 17 pounds

• 119 pounds

• 120 pounds

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CCSS.7.RP.A.3

Is this graph proportional?

• Yes
• No

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CCSS.7.RP.A.2D

What is the constant of proportionality in this graph?

• k=1

• k=2

• k=3

• k=5

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CCSS.7.RP.A.2B

The cost (c) in dollars of a pound of apples varies directly with the weight (w) in pounds of the apples. Assume the constant of proportionality is $4.25. Write an equation to show this relationship.

• $c=4.25w$

• $w=4.25c$

• $c=\frac{w}{4.25}$

• $w=\frac{c}{4.25}$

Tags

CCSS.7.RP.A.2C

The cost (c) in dollars of a pound of apples varies directly with the weight (w) in pounds of the apples. Assume the constant of proportionality is $4.25. How much would $5\ \frac{1}{2}$ pounds of apples cost? 

• $23.38

• $0.77

• $18.42

• $25.68

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CCSS.6.RP.A.3C

The cost (c) in dollars of a pound of apples varies directly with the weight (w) in pounds of the apples. Assume the constant of proportionality is $4.25. If Maura spent $12.75 on apples, how many pounds did she buy?

• 1 pound

• 2.5 pounds

• 3 pounds

• 4.25 pounds

Tags

CCSS.6.RP.A.3C

 $y=kx$   $k=\frac{y}{x}$  

Use one of the equations to solve if x = 7 and y = 2.

•  $k=3\ \frac{1}{2}$  

•  $k=\frac{2}{7}$  

•  $k=\frac{7}{2}$  

•  $k=14$  

Tags

CCSS.7.RP.A.2B