Constant of Proportionality (unit rate)

A rocket travels at a rate of 160 meters in 3 seconds. What is the speed of the rocket in meters per second? (hint: set up proportions meters/seconds= meters/seconds

• A. 60 m/sec

• B. 53 1/3 m/sec

• C. 65 1/4 m/sec

• D. 48 m/sec

• E. 480 m/sec

Tags

CCSS.6.RP.A.3B

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? (hint: set up your proportions using the anwers as the first fraction and one of the pairs on the table that matches the time- then compare- no work required)

• A. The grasshopper chirps 45 times in 1/2 minute

• B. The grasshopper chirps 90 times in 1 minute

• C. The grasshopper chirps 22.5 times in 1 minute

• The grasshopper chirps 135 times in 1.5 minutes

Tags

CCSS.7.RP.A.2B

The graph shows number of calories in a given number of donuts. Which of the following best describes the constant of proportionality? (to find the k, you need to find the value of y when x=1) (use the graph on your work)

• A. 100 calories per donut

• B. 300 calories per donut

• C. 150 calories per donut

• D. 600 calories per donut

Tags

CCSS.7.RP.A.2B

Peyton ran 4/5 of a mile in 1/8 of an hour. What is Peyton's constant of proportionality in miles per hour? (set up your proportion first. .80/.125 = x/1 and solve)

• A. 6.4 mph

• B. 15.6 mph

• C. 5.8 mph

• D. 8.1 mph

• E. 4.9 mph

Tags

CCSS.7.RP.A.2B

The table shows Jamal's salary earned. How much does Jamal earn per hour?

• A. $10.25

• B. $11.50

• C. $12.75

• D. $14.50

Tags

CCSS.6.RP.A.3B

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? (Hint: find the UNIT rate for each by dividing the cost / ounces, then compare UNIT PRICE

• A. 48 ounces for $5.00

• B. 32 ounces for $4.00

• C. 60 ounces for $6.75

• D. 45 ounces for $4.50

Tags

CCSS.6.RP.A.3B

Leah and her friends go on a hot air balloon ride. What is the constant rate of proportionality in feet per minute?

• A. 175 ft/min

• B. 187.5 ft/min

• C. 1,500 ft/min

• D 700 ft/min

Tags

CCSS.7.RP.A.2D

The graph below shows the elevation of 3 submarines during their first four minutes descending into the water. Which statement below is true?

• A. Submarine A descends the fastest, and submarine C descends the slowest.

• B. Submarine B descends the fastest, and submarine A descends the slowest.

• C. Submarine C descends the fastest, and submarine B descends the slowest.

• Submarine C descends the fastest and submarine A descends the slowest.

Tags

CCSS.8.EE.B.5

The price of candy at The Candy Stop 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? (unit rate)

• A. $2.95/pound

• B. $5.90/2 pounds

• C. $1/pound

• D. $8.85/3 pounds

Tags

CCSS.7.RP.A.2B

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

• A. 10.8 mph

• B. 9 mph

• C. 19 mph

• D. 8.5 mph

Tags

CCSS.6.RP.A.1

CCSS.6.RP.A.2