Ratios and Proportions

In the equation y = 14x, what is the constant of proportionality?

• y

• x

• 14

Which of these describes the unit rate?

• unit of measure

• fraction with a numerator of one

• fraction with a denominator of one

• proportion

Write as a percent.
5/8

• 62.5%

• 0.625

• 64%

• 6.25%

Solve: 90 is 45% of what number?

• 178

• 200

• 40.5

• 216

A scale drawing of a billboard uses the scale 4 cm:9 ft. The length of the billboard in the drawing is 11 cm. How long is the actual billboard?

• 13 ft

• 20.75 ft

• 24.75 ft

• 22 ft

A cake recipe calls for 1.5 cups of milk and 3 cups of flour. Seth made a mistake and used 5 cups of flour. How many cups of milk should he use to keep the proportions correct?

• 2.5 cups milk

• 1.75 cups milk

• 2 cups flour

• 2.25 cups milk

Find the unit rate of 40 meters in 16 seconds

• 0.4 meters per second

• 0.4 seconds per meter

• 2.5 meters per second

• 640 meters per second

Find the unit rate of $7.96 for 5 pounds of jolly ranchers. 

• $0.63 per pound

• 1.59 pounds

• $1.59 per pound

• A
• B
• C
• D

At a grocery store, three-dozen cookies cost $9.00. What would be the cost of one cookie?

• $0.25

• $1.25

• $0.50

• $0.33