7th Grade Math Review: Proportionality

A rocket travels at a rate of 160 meters in 3 seconds. What is the speed of the rocket in meters per second?

• 60 m/sec

• 53 1/3 m/sec

• 65 1/4 m/sec

• 48 m/sec

• 480 m/sec

The table shows the number of times a grasshopper chirped in a given time period.

Which of the following best describes the constant of proportionality?

• The grasshopper chirps 45 times in 1/2 a minute

• The grasshopper chirps 90 times in 1 minute.

• The grasshopper chirps 22.5 times in 1 minute.

• The grasshopper chirps 135 times in 1.5 minutes.

The graph shows the number of calories in a given number of donuts.

Which of the following best describes the constant of proportionality?

• 100 calories per donut

• 300 calories per donut

• 150 calories per donut

• 600 calories per donut

Ta'mya ran 4/5 of a mile in 1/8 of an hour. What is Ta'mya's constant rate of proportionality in miles per hour?

• 6.4 mph

• 15.6 mph

• 5.8 mph

• 8.1 mph

The table shows the salary Yuridia earned working at her new job. How much does Yuridia earn per hour?

• $10.25

• $11.50

• $12.75

• $14.50

A company is trying to decide which container of coffee to buy for a staff meeting. Which of the following would be the best deal?

• 48 ounces for $5.00

• 32 ounces for $4.00

• 60 ounces for $6.75

• 45 ounces for $4.50

The price of candy at The Baker Shop can be determined by the equation p=2.95n, where p is the price and n is the number of pounds of candy. What is the constant of proportionality?

• $2.95 / pound

• $5.90 / pound

• $1 / pound

• $8.85 / 3 pounds

Treyvion rides his bike 9 miles in 50 minutes. What is Treyvion's speed in miles per hour?

• 10.8 mph

• 9 mph

• 19 mph

• 8.5 mph

Which graph represents a proportional relationship?

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Which table represents a proportional relationship between x and y?

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